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19-3373; Rev 0; 7/04
250mA LDO Linear Regulators with Current-Limiting Switch
General Description
The MAX4834/MAX4835 family of low-dropout (LDO) linear regulators feature an accurate current-limiting switch with an integrated FLAG or RESET function. These devices operate from 2.5V to 5.5V and deliver up to 250mA of load current at a preset output voltage. Preset output voltage levels are 1.8V/2.5V/2.8V/3.0V/3.3V. The MAX4834/MAX4835 offer a programmable softstart control function to eliminate false reset during startup. The MAX4834 provides a FLAG function to notify the system when the load current exceeds the limit. The MAX4835 provides a RESET function to notify the system when the output drops below the threshold. Additionally, reverse-current protection prevents current flowing from the output to the input. Other features include a low 90A quiescent current, a 0.1A shutdown current. The MAX4834/MAX4835 are available in space-saving 6-pin SOT23 and TDFN packages. Each device is specified over the -40C to +85C extended temperature range. Contact factory for other programmed output voltage versions from 1.5V to 3.3V in 100mV increments. For pin-compatible 100mA versions of this device, refer to the MAX4832/MAX4833. For pin-compatible 500mA versions of this device, refer to the MAX4836/MAX4837. Accurate Current Limit Preset Output Voltages: 1.8V/2.5V/2.8V/3.0V/3.3V 2.5V to 5.5V Supply Voltage Range Adjustable Soft-Start Low Dropout Voltage Thermal Shutdown Reverse-Current Protection Shutdown Output Discharge (MAX4835) Low 90A Supply Current Ultra-Low 0.1A Shutdown Current FLAG and Latch Off (MAX4834) or RESET (MAX4835) Tiny SOT23 and TDFN (3mm x 3mm) Packages
Features
Guaranteed Minimum 250mA Load Current
MAX4834/MAX4835
Ordering Information
PART MAX4834EUTxy_-T* MAX4834ETTxy_-T MAX4835EUTxy_dd-T* MAX4835ETTxy_dd-T TEMP RANGE -40C to +85C -40C to +85C -40C to +85C -40C to +85C PIN-PACKAGE 6 SOT23-6 6 TDFN-6 6 SOT23-6 6 TDFN-6
Applications
SDIO Ports and Devices USB Ports and Devices PDAs and Palmtop Devices Notebook Computers Cell Phones GPS Systems
Pin Configurations
TOP VIEW
IN
1
6 5 4
OUT SS RESET (FLAG)
GND SHDN
2 3
MAX4834/MAX4835
EXPOSED PADDLE
Note: "xy" are placeholders for the output voltage levels of the devices. Insert the values found in Table 1 at the end of this document in the place of "xy". The "_" is a placeholder for either the RESET or the FLAG feature. Insert "B" in the place of "_" for RESET and "C" for FLAG. "dd" is a placeholder for the reset timeout period. Insert the values found in Table 2 in the place of "dd." For example, MAX4835EUT18BD2 has a 1.8V output voltage, RESET feature, and a 30ms reset timeout period. Note that "dd" applies only to the devices with RESET option and does not apply to the devices with FLAG option. For devices with the FLAG option, leave dd blank. Standard versions require a minimum order increment of 2.5k units. Nonstandard versions must be ordered in 10k unit increments. Contact factory for availability. *Future product--contact factory for availability. Tables 1 and 2 and Selector Guide appear at end of data sheet.
TDFN ( ) MAX4834ETTxyC ONLY. Pin Configurations continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
250mA LDO Linear Regulators with Current-Limiting Switch MAX4834/MAX4835
ABSOLUTE MAXIMUM RATINGS
IN, SHDN, FLAG, OUT to GND ................................-0.3V to +6V RESET to GND .........................................-0.3V to (VOUT + 0.3V) SS to GND ...................................................-0.3V to (VIN + 0.3V) IN to OUT ...............................................................................6V OUT Short Circuit to GND ..........................................Continuous All Pins ESD Handling (Human Body Model).........................2kV Continuous Power Dissipation (TA = +70C) 6-Pin SOT23 (derate 9.1mW/C above +70C)................727mW 6-Pin TDFN (derate 24.4mW/C above +70C) ..........1951.2mW Operating Temperature Range ...........................-40C to +85C Operating Junction Temperature Range ...........-40C to +125C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VIN = VOUT + 1V, SHDN = IN, COUT = 3.3F, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER Operating Voltage Input Undervoltage Lockout Threshold Input Undervoltage Lockout Threshold Hysteresis SHDN = IN, IOUT = 0 Quiescent Current IQ SHDN = IN, IOUT = 0, VUVLO < VIN < VOUT (nominal) SHDN = GND, IOUT = 0 Dropout Voltage (Note 2) Output Voltage Accuracy Output Current Output Current Limit Reverse Current at VIN Soft-Start Time (Note 3) tSS IOUT VOUT = 0V VOUT = 5.5V, VIN = 0V to VOUT CSS = not connected CSS = 0.01F CSS = 0.1F Line Regulation (Note 4) Load Regulation Output Noise SHUTDOWN INPUT (SHDN) OUT Discharge Resistance in Shutdown (MAX4835) SHDN Input-Voltage High SHDN Input-Voltage Low SHDN Input Hysteresis SHDN Input Leakage Current SHDN = IN or GND -100 VIH VIL 30 +100 SHDN = GND 1.4 0.5 900 V V mV nA VOUT + 0.5V < VIN < 5.5V, ILOAD = 100A TA = +25C TA = -40C to +85C 0.5 4 40 -0.04 -0.05 IOUT = 250mA TA = +25C TA = -40C to +85C -1.3 -2 250 270 0.1 1 10 100 +0.02 +0.03 1.3 70 330 2 2.0 15 150 +0.065 %VNOM/ V +0.08 %VNOM VRMS ms SYMBOL VIN VUVLO VIN rising CONDITIONS MIN 2.5 2.00 50 90 150 0.1 103 2 140 165 +1.3 +2 mV %VNOM mA mA A 150 A TYP MAX 5.5 2.25 UNITS V V mV
IOUT = 1mA to 250mA, TA = +25C IOUT = 1mA to 250mA, TA = -40C to +85C
100A < ILOAD < 250mA, VIN = VOUT + 1V 10Hz to 100kHz, CSS = 0.01F
2
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250mA LDO Linear Regulators with Current-Limiting Switch
ELECTRICAL CHARACTERISTICS (continued)
(VIN = VOUT + 1V, SHDN = IN, COUT = 3.3F, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER RESET OUTPUT (MAX4835) RESET Threshold OUT Drop to RESET Delay (Note 5) VRESET tOR D1 timing option RESET Timeout Period tRESET D2 timing option D3 timing option D4 timing option VOUT 1.0V, ISINK = 50A, RESET asserted RESET Output-Voltage Low VOUT 1.5V, ISINK = 3.2mA, RESET asserted VOUT 2.0V, ISOURCE 500A, RESET deasserted tBLANK VOUT + 1V VIN 5.5V, OUT = GND ISINK = 3.2mA, FLAG asserted, VOUT 1.5V VFLAG = 5.5V 0.01 0.8 x VOUT 5 10 17 0.4 1 2.5 20 150 1200 0.85 x VOUT 0.875 x VOUT 35 3.75 30 225 1800 5.0 40 300 2400 0.3 0.4 V ms 0.90 x VOUT V s SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX4834/MAX4835
RESET Output-Voltage High FLAG OUTPUT (MAX4834) Blanking Time (Note 6) Open-Drain FLAG OutputVoltage Low Open-Drain FLAG Leakage Current THERMAL PROTECTION Thermal-Shutdown Temperature Thermal-Shutdown Hysteresis
V
ms V A
Junction temperature rising
+165 15
C C
Note 1: Parts are 100% tested at +25C. Limits across the full temperature range are guaranteed by design and correlation over the specified temperature range. Note 2: The dropout voltage is measured from VIN to VOUT when VOUT is 2% below its nominal value. The nominal output voltage is measured from VOUT to GND when VIN is 1V greater than VOUT. Defined only for VOUT 2.5V. Note 3: Soft-start time is defined as the time required for the output to rise from 10% of its nominal value to 90% of its nominal value. Note 4: For VOUT < 2V, VIN must be above 2.5V. Note 5: This is the maximum time OUT can be out of tolerance before a reset is issued. It is implemented to ensure that momentary output glitches do not trigger a reset condition. Note 6: In startup mode, the blanking time counter is not started until the soft-start time has elapsed. The total time from startup to FLAG issued is tSS + tBLANK.
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3
250mA LDO Linear Regulators with Current-Limiting Switch MAX4834/MAX4835
Typical Operating Characteristics
(VIN = VOUT + 1V, SHDN = IN, COUT = 3.3F, TA = +25C, unless otherwise noted.)
QUIESCENT CURRENT vs. INPUT VOLTAGE (NO LOAD)
MAX4834 toc01
QUIESCENT CURRENT vs. INPUT VOLTAGE (250mA LOAD)
MAX4834 toc02
MAXIMUM TRANSIENT DURATION vs. RESET THRESHOLD OVERDRIVE
MAX4834 toc03
120 TA = +85C 100 80 IQ (A) 60 TA = -40C 40 20 VOUT = 1.5V 0 0 1 2 3 VIN (V) 4 5 6 TA = +25C
500 TA = +85C 400
90 75 PULSE DURATION (s) 60 45 30 15
RESET ASSERTS ABOVE THIS LINE
IQ (A)
300 TA = +25C 200 TA = -40C
100 VOUT = 3.3V 0 0 1 2 3 VIN (V) 4 5 6
0 1 10
VIN = 3.5V VOUT = 2.5V 100
RESET THRESHOLD OVERDRIVE (mV)
DROPOUT VOLTAGE vs. LOAD CURRENT
MAX4834 toc04
POWER-SUPPLY REJECTION RATIO vs. FREQUENCY
MAX4834 toc05
REGION OF STABLE COUT ESR vs. LOAD CURRENT
VOUT = 1.8V 6 5 COUT ESR () 4 STABLE REGION 3 2 1 0 COUT = 3.3F
MAX4834 toc06
100 VOUT = 3.3V DROPOUT VOLTAGE (mV) 80
0 -10 -20 PSRR (dB) VOUT = 2V COUT = 3.3F ILOAD = 20mA
7
60
-30 -40 -50 -60 -70
40
20
0 0 50 100 150 200 250 LOAD CURRENT (mA)
-80 0.01 0.1 1 FREQUENCY (kHz) 10 100
0
50
100
150
200
250
LOAD CURRENT (mA)
OUTPUT NOISE vs. FREQUENCY
MAX4834 toc07
SOFT-START RESPONSE (CSS = FLOATING)
VOUT = 3.3V
50 VIN = 3V VOUT = 1.8V CSS = 10nF ILOAD = 0
MAX4834 toc08
40 OUTPUT NOISE (VRMS)
VIN 2V/div
30
20
tSS
VOUT 2V/div VSS 1V/div
10
0 10 100 1k FREQUENCY (Hz) 10k 100k 2ms/div
4
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250mA LDO Linear Regulators with Current-Limiting Switch
Typical Operating Characteristics (continued)
(VIN = VOUT + 1V, SHDN = IN, COUT = 3.3F, TA = +25C, unless otherwise noted.)
MAX4834/MAX4835
SOFT-START RESPONSE (CSS = 0.01F)
MAX4834 toc09
SOFT-START RESPONSE (CSS = 0.1F)
MAX4834 toc10
LOAD-TRANSIENT RESPONSE
MAX4834 toc11
VIN 2V/div tSS tSS VOUT 2V/div
VIN 2V/div
VIN = 4.3V VOUT = 3.3V CIN = 0.1F COUT = 3.3F ILOAD: STEP FROM 10mA TO 100mA BACK TO 10mA
VOUT 2V/div
VOUT 50mV/div AC-COUPLED
VSS 1V/div 2ms/div 20ms/div
VSS 1V/div
100s/div
LOAD-TRANSIENT RESPONSE NEAR DROPOUT
MAX4834 toc12
LINE-TRANSIENT RESPONSE
MAX4834 toc13
RESET RESPONSE TO VIN
CSS = FLOATING 5V VIN 500mV/div 4.5V VOUT 50mV/div AC-COUPLED tRESET
MAX4834 toc14
VIN = 3.4V VOUT = 3.3V CIN = 0.1F COUT = 3.3F ILOAD: STEP FROM 10mA TO 100mA BACK TO 10mA
VIN 2V/div
VOUT 50mV/div AC-COUPLED
VOUT 2V/div
CIN = 0.1F COUT = 3.3F VOUT = 3.3V ILOAD = 10mA 100s/div 100s/div
VRESET 2V/div
40ms/div
RESET RESPONSE TO VOUT
VIN = 3.5V, CSS = FLOATING
RESET RESPONSE TO SHUTDOWN
MAX4834 toc16
MAX4834 toc15
VIN = 3.5V, CSS = FLOATING VSHDN 2V/div
VOUT 1V/div
VOUT 2V/div tRESET VRESET 1V/div
tRESET
VRESET 2V/div
40ms/div
40ms/div
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5
250mA LDO Linear Regulators with Current-Limiting Switch MAX4834/MAX4835
Typical Operating Characteristics (continued)
(VIN = VOUT + 1V, SHDN = IN, COUT = 3.3F, TA = +25C, unless otherwise noted.)
FLAG RESPONSE WHEN OUT IS SHORTED TO GND > BLANKING TIME (IN IS TOGGLED)
MAX4834 toc18
FLAG RESPONSE WHEN OUT IS SHORTED TO GND < BLANKING TIME
MAX4834 toc17
FLAG RESPONSE WHEN OUT IS SHORTED TO GND > BLANKING TIME (SHDN IS TOGGLED)
MAX4834 toc19
VOUT 1V/div tBLANK IOUT 200mA/div VFLAG 2V/div
VOUT 1V/div
VOUT 1V/div
VFLAG 2V/div
tBLANK
VFLAG 2V/div
VIN 2V/div FLAG CONNECTED TO LOGIC SUPPLY FLAG CONNECTED TO LOGIC SUPPLY 10ms/div
VSHDN 2V/div
1ms/div
10ms/div
STARTUP IN AN OVERLOAD CONDITION (CSS NOT CONNECTED)
MAX4834 toc20
STARTUP IN AN OVERLOAD CONDITION (CSS = 0.01F)
VIN 2V/div
NORMALIZED OUTPUT VOLTAGE vs. TEMPERATURE
VIN 2V/div NORMALIZED TO +25C NORMALIZED OUTPUT VOLTAGE 1.002 ILOAD = 250mA 1.000 ILOAD = 10mA 0.998 ILOAD = 100mA
MAX4834 toc22
MAX4834 toc21
1.004
tSS
tBLANK
VOUT 2V/div
tSS
tBLANK
VOUT 2V/div
VFLAG 2V/div
VFLAG 2V/div
0.996
VSS 1V/div 2ms/div VOUT = 2.5V ILOAD = ILIMIT MAXIMUM FLAG CONNECTED TO LOGIC SUPPLY 4ms/div VOUT = 2.5V ILOAD = ILIMIT MAXIMUM FLAG CONNECTED TO LOGIC SUPPLY
VSS 1V/div
0.994 -40 -15 10 35 60 85 TEMPERATURE (C)
6
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250mA LDO Linear Regulators with Current-Limiting Switch
Pin Description
PIN SOT23 1 2 3 TDFN 1 2 3 NAME IN GND SHDN FUNCTION Regulator Power Input. Bypass IN to GND with a 0.1F ceramic capacitor. Install the bypass capacitor as close to the device as possible. Ground Active-Low Shutdown Input. Drive SHDN low to shutdown the regulator. Drive SHDN high or connect to IN for normal operation.
MAX4834/MAX4835
Overcurrent Flag. Open-drain FLAG goes low when the device senses sustained current FLAG exceeding the current-limit threshold for a duration longer than the blanking time. FLAG is high (MAX4834) when SHDN is low or the device is in thermal shutdown. 4 4 Active-Low Reset Output. Push-pull RESET goes low when the voltage at OUT is below the reset RESET threshold or when the voltage at OUT is greater than IN. RESET is low when SHDN is low or the (MAX4835) device is in thermal shutdown. After the reset condition terminates, RESET remains low for the duration of the reset timeout period. Soft-Start Control. Connect a capacitor, CSS, from SS to GND to program the output rise time at startup. No capacitor from SS to GND gives 1ms output rise time at startup. See the soft-start response time plots in the Typical Operating Characteristics. Regulator Output. Bypass OUT to GND with a 3.3F or larger ceramic capacitor. The capacitor's ESR should be less than 0.2 for stable operation. Exposed Pad. EP is internally connected to GND. Externally connect EP to GND to provide a low thermal resistance path from the IC junction to the PC board.
5
5
SS
6 --
6 EP
OUT EP
Detailed Description
The MAX4834/MAX4835 are ultra-low quiescent current, low-dropout linear regulators with an integrated current limiter. These devices guarantee up to 250mA drive capabilities and regulate the preset output voltage. The MAX4834 has a flag output that asserts low when the load current exceeds the current limit for more than the blanking time (tBLANK). The MAX4835 has a reset output that asserts low when the regulator output voltage is below the reset threshold voltage (V RESET ). VRESET is 87.5% of the nominal output voltage. Figure 1 shows the simplified functional diagram and Figure 2 shows the typical application circuits.
RESET Output (MAX4835)
The RESET output asserts when one of the following conditions occurs: * The input voltage (VIN) is below the input undervoltage lockout threshold (VUVLO). * The output voltage (VOUT) is below the reset threshold (VRESET). * SHDN is pulled low. * The device is in thermal shutdown. * When VOUT > VIN. RESET remains low for the reset timeout period (tRESET) after reset conditions are terminated. There are four RESET timeout periods available as shown in the Electrical Characteristics table. RESET is available in a push-pull configuration as shown in the Selector Guide.
FLAG Output (MAX4834)
The open-drain FLAG output goes low and the LDO's pass transistor is latched off when the current in the pass transistor is at its output current limit for more than the blanking time (tBLANK). Cycling IN or SHDN (high to low to high) brings the device out of its latched-off state and back into normal operation.
Shutdown
Pull SHDN low to shut down the LDO and reduce the quiescent current consumption of the device from 90A to 0.1A. In shutdown mode, the pass transistor, control circuit, and reference circuit are turned off. Connect SHDN to a supply voltage greater than VIH to turn on the LDO.
7
_______________________________________________________________________________________
250mA LDO Linear Regulators with Current-Limiting Switch MAX4834/MAX4835
THERMAL PROTECTION PASS TRANSISTOR ERROR AMPLIFIER VSS
MAX4834/MAX4835
OUT MAX4835 ONLY 900 SWITCH CLOSED IN SHUTDOWN
IN
REVERSECURRENT PROTECTION
vFB
OVERLOAD PROTECTION
VREF 1.23V
VREF SWITCH OPEN DURING SOFT-START
SHDN
VREF RESET (FLAG) RESET TIMEOUT (BLANKING PERIOD) VFB
VSS = VREF WHEN SOFT-START IS COMPLETE 90% x VREF
1.23A
VSS SS
1nF GND ( ) MAX4834E_ _xyC ONLY.
Figure 1. Functional Diagram
IN 2.5V TO 5.5V CIN 0.1F VLOGIC
OUT COUT 3.3F 2.5V TO 5.5V LOAD CIN 0.1F
IN
OUT COUT 3.3F LOAD
MAX4834
TO C FLAG SS CSS TO C
MAX4835
RESET SS CSS
ON SHDN OFF GND OFF
ON SHDN GND
Figure 2. Typical Application Circuits 8 _______________________________________________________________________________________
250mA LDO Linear Regulators with Current-Limiting Switch
Shutdown Discharge (MAX4835)
OUT discharges through a 900 internal resistor during shutdown mode.
Applications Information
Capacitor Selection and Regulator Stability
For stable operation over the full temperature range and with load currents up to 250mA, use a 3.3F (min) ceramic output capacitor with an ESR <0.2. To reduce noise and improve load transient response, stability, and power-supply rejection, use larger output capacitor values such as 10F (note that some ceramic capacitors exhibit large capacitance and ESR variation with temperature). X7R capacitors provide good performance over the -40C to +85C operating temperature range. To improve power-supply rejection and transient response, use a 0.1F capacitor between IN and GND. The MAX4834/MAX4835 remain stable with purely resistive loads or current loads up to 250mA.
MAX4834/MAX4835
Reverse OUT to IN Current
When the output voltage is greater than the input voltage, the internal pass transistor turns off. To avoid reverse-charging the input source, the current at IN is guaranteed to be below 3A when VOUT VIN.
Current Limit
The MAX4834/MAX4835 include an accurate internal current-limiting circuit. OUT can be shorted to ground indefinitely without damaging the part. The MAX4834 latches off if the load current exceeds the current limit for more than the blanking time (see the FLAG Output section). During soft-start, the device does not latch off to an overload condition. During an overload condition, the MAX4835 holds the current at current limit until the thermal limit is reached. Once the junction temperature reaches +165C, thermal shutdown occurs.
15kV Operational ESD Protection
A 3.3F or higher value ceramic capacitor from OUT to GND provides a 15kV (Human Body Model) protection at OUT. The ESR value of the capacitor should be less than 0.2.
Thermal Shutdown
When the junction temperature (TJ) exceeds +165C, the LDO's pass transistor turns off allowing the junction to cool. The LDO's pass transistor turns on again after the IC's junction temperature cools by 15C, resulting in a pulsed output during continuous thermal overload conditions.
Reset Transient Immunity
The reset circuit is relatively immune to short duration, falling V OUT transients. The Typical Operating Characteristics show a graph of the Maximum Transient Duration vs. Reset Threshold Overdrive for which reset is not asserted. The graph was produced using falling VOUT transients starting at VOUT and ending below the reset threshold by the magnitude indicated (reset threshold overdrive). The graph shows the maximum pulse width that a falling VOUT transient can typically have without triggering the reset pulse. As the amplitude of the transient increases (i.e., goes further below the reset threshold), the maximum allowable pulse width decreases. Typically, a VOUT transient that goes only 10mV below the reset threshold and lasts up to 54s does not trigger a reset pulse.
Soft-Start
During power-up, the soft-start ensures that the output ramps up slowly reducing inrush current peaks. See the soft-start response time plots in the Typical Operating Characteristics. The soft-start time (tSS) is given by the following equation: tSS = CSS (ms) where CSS is in nF. A soft-start capacitor (CSS) of 10nF gives a 10ms tSS. A 1ms minimum soft-start time is fixed internally to ensure that the output rises slowly even without any external capacitor at SS pin to ground. The device is in soft-start mode when either the voltage at IN or SHDN is cycled high to low to high.
Layout
When using the TDFN package, connect its exposed paddle to GND to provide a low thermal resistance path for heat transfer from the IC junction to the printed circuit board.
_______________________________________________________________________________________
9
250mA LDO Linear Regulators with Current-Limiting Switch MAX4834/MAX4835
Selector Guide
PART MAX4834EUTxyC-T MAX4834ETTxyC-T MAX4835EUTxyBdd-T MAX4835ETTxyBdd-T PINPACKAGE 6 SOT23-6 6 TDFN-6 6 SOT23-6 6 TDFN-6 OUTPUT CURRENT (mA) 250 250 250 250 RESET OUTPUT CONFIGURATION Open-Drain Open-Drain Push-Pull Push-Pull RESET (FLAG) FLAG FLAG RESET RESET SHUTDOWN DISCHARGE No No Yes Yes LATCH OFF Yes Yes No No
Suffix `xy' in the part number stands for nominal output voltage. 1.8V, 2.5V, 2.8V, 3.0V, 3.3V are the standard options. For other voltages between 1.5V to 3.3V, contact factory.
Table 1. Standard Output Voltage Suffix Guide
xy 18 25 28 30 OUTPUT VOLTAGE (V) 1.8 2.5 2.8 3.0
Pin Configurations (continued)
TOP VIEW
IN 1
6
OUT
GND 2
MAX4834/ MAX4835
5
SS
33 3.3 Nonstandard output voltages from 1.5V to 3.3V are available in 100mV increments. Contact factory for availability.
SHDN 3
4
RESET (FLAG)
Table 2. RESET Timeout Period Suffix Guide
dd D1 D2 D3 D4 RESET TIMEOUT (ms) 3.75 30 225 1800
SOT23 ( ) MAX4834EUTxyC ONLY.
Chip Information
TRANSISTOR COUNT: 1575 PROCESS: BiCMOS TDFN Exposed Pad: Connected to GND
10
______________________________________________________________________________________
250mA LDO Linear Regulators with Current-Limiting Switch
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.)
MAX4834/MAX4835
D
N
PIN 1 INDEX AREA
E
DETAIL A
E2
C L
C L
L A e e
L
PACKAGE OUTLINE, 6, 8, 10 & 14L, TDFN, EXPOSED PAD, 3x3x0.80 mm
NUMBER OF LEADS SHOWN ARE FOR REFERENCE ONLY
21-0137
F
1
2
COMMON DIMENSIONS SYMBOL A D E A1 L k A2 MIN. 0.70 2.90 2.90 0.00 MAX. 0.80 3.10 3.10 0.05
0.40 0.20 0.25 MIN. 0.20 REF.
PACKAGE VARIATIONS PKG. CODE T633-1 T833-1 T1033-1 T1433-1 T1433-2 N 6 8 10 14 14 D2 1.500.10 1.500.10 1.500.10 1.700.10 1.700.10 E2 2.300.10 2.300.10 2.300.10 2.300.10 2.300.10 e 0.95 BSC 0.65 BSC 0.50 BSC 0.40 BSC 0.40 BSC JEDEC SPEC MO229 / WEEA MO229 / WEEC MO229 / WEED-3 ------b 0.400.05 0.300.05 0.250.05 0.200.03 0.200.03 [(N/2)-1] x e 1.90 REF 1.95 REF 2.00 REF 2.40 REF 2.40 REF
PACKAGE OUTLINE, 6, 8, 10 & 14L, TDFN, EXPOSED PAD, 3x3x0.80 mm
21-0137
F
2
2
______________________________________________________________________________________
6, 8, &10L, DFN THIN.EPS
11
250mA LDO Linear Regulators with Current-Limiting Switch MAX4834/MAX4835
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.)
6LSOT.EPS
PACKAGE OUTLINE, SOT-23, 6L
21-0058
F
1
1
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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