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19-3684; Rev 0; 5/05
Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN
General Description
The MAX1963A/MAX1976A low-dropout linear regulators operate from a +1.62V to +3.6V supply and deliver a guaranteed 300mA continuous load current with a low 100mV dropout. The high-accuracy (0.5%) output voltage is preset to an internally trimmed voltage in the +0.75V to +3.0V range. An active-low, open-drain reset output remains asserted for at least 2.2ms (MAX1963A) or 70ms (MAX1976A) after the output voltage reaches regulation. These devices are offered in thin SOT23 and thin DFN packages. An internal pMOS pass transistor allows the low supply current to remain independent of load and dropout voltage, making these devices ideal for portable battery-powered equipment. Low 1.62V Minimum Input Voltage Guaranteed 300mA Output Current 2.5% Accuracy Over Load/Line/Temp Low 100mV Dropout at 300mA Load 2.2ms (MAX1963A) or 70ms (MAX1976A) RESET Output Flag Supply Current Independent of Load and Dropout Voltage Logic-Controlled Shutdown Thermal-Overload and Short-Circuit Protection Preset Output Voltages (0.75V to 3.0V) Tiny 6-Pin Thin SOT23 Package (<1.1mm High) TDFN Package (<0.8mm High)
Features
MAX1963A/MAX1976A
Applications
Notebook/Handheld Computers Cellular/Smart/PDA Phones DSC, CD/MP3 Players PCMCIA Cards
Ordering Information
PART* TEMP RANGE PIN-PACKAGE -40C to +85C 6 Thin SOT23-6 -40C to +85C 6 TDFN-6 3mm x 3mm -40C to +85C 8 TDFN-8 2mm x 2mm -40C to +85C 6 Thin SOT23-6 -40C to +85C 6 TDFN-6 3mm x 3mm -40C to +85C 8 TDFN-8 2mm x 2mm MAX1963AEZT_ _ _-T MAX1963AETT_ _ _-T
SHDN N.C. IN GND
Pin Configurations
TOP VIEW
8 IN 1 6 OUT
MAX1963AETA_ _ _-T MAX1976AEZT_ _ _-T MAX1976AETT_ _ _-T MAX1976AETA_ _ _-T
7
6
5
GND 2
MAX1963A MAX1976A
5 I.C.
MAX1963A MAX1976A
1 OUT 2 N.C. 3 I.C. 4 RESET
*Insert the desired three-digit suffix (see the Selector Guide) into the blanks to complete the part number. Contact the factory for other output voltages.
SHDN 3
4 RESET
Typical Operating Circuit
INPUT 1.62V TO 3.6V CIN 1F IN OUT UP TO 300mA OUTPUT 0.75V TO 3.0V COUT LOGIC 4.7F SUPPLY 100k ON SHDN OFF GND RESET TO C
THIN SOT23
SHDN GND 4 IN
TDFN 2mm x 2mm
6
5
MAX1963A MAX1976A
1 OUT 2 I.C. 3 RESET
MAX1963A MAX1976A
TDFN 3mm x 3mm
Selector Guide appears 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.
Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN MAX1963A/MAX1976A
ABSOLUTE MAXIMUM RATINGS
IN, SHDN, RESET to GND .....................................-0.3V to +4.0V OUT to GND ................................................-0.3V to (VIN + 0.3V) Output Short-Circuit Duration.....................................Continuous Continuous Power Dissipation (TA = +70C) 6-Pin SOT23 (derate 9.1mW/C above +70C)............727mW 6-Pin TDFN (derate 24.4mW/C above +70C) .........1951mW 8-Pin TDFN (derate 11.9mW/C above +70C) ........953.5mW Operating Temperature Range ...........................-40C to +85C Junction Temperature ..................................................... +150C 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 + 0.5V) or 1.8V, whichever is greater; SHDN = IN, CIN = 1F, COUT = 4.7F, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER Input Voltage Input Undervoltage Lockout Output Voltage Accuracy Maximum Output Current Current Limit Ground Current Dropout Voltage Load Regulation Line Regulation Output Noise PSRR SHUTDOWN Shutdown Supply Current SHDN Input Logic Levels SHDN Input Bias Current Turn-On Delay IOFF VIH VIL ISHDN SHDN = GND VIN = 1.62V to 3.6V VIN = 1.62V to 3.6V VSHDN = 0 or 3.6V TA = +25C TA = +85C 1 5 90 TA = +25C TA = +85C 1.4 0.6 100 0.001 0.01 1 A V nA s IOUT ILIM IQ SYMBOL VIN VUVLO VIN rising or falling (180mV typical hysteresis) IOUT = 1mA to 300mA, VIN = (VOUT + 0.5V) to +3.6V Continuous VOUT = 96% of nominal value No load IOUT = 300mA Dropout (Note 2) VIN - VOUT IOUT = 300mA, VOUT 1.8V (Note 2) VLDR VLNR IOUT = 1mA to 300mA VIN = (VOUT + 0.5V) to +3.6V, IOUT = 1mA 10Hz to 100kHz, IOUT = 10mA, VOUT = 1.5V f < 1kHz, IOUT = 10mA -0.15 CONDITIONS MIN 1.62 1.30 -2.5 300 450 550 70 90 70 100 0.02 +0.01 86 70 200 0.3 +0.15 mV % % /V VRMS dB 650 140 A 0.5 TYP MAX 3.60 1.60 +2.5 UNITS V V % mARMS mA
From SHDN high to OUT high, VOUT = 1.8V
2
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Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN
ELECTRICAL CHARACTERISTICS (continued)
(VIN = (VOUT + 0.5V) or 1.8V, whichever is greater; SHDN = IN, CIN = 1F, COUT = 4.7F, TA = -40C to +85C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER RESET OUTPUT Reset Threshold Accuracy RESET Output Low Voltage RESET Output High Leakage Reset Delay THERMAL PROTECTION Thermal-Shutdown Temperature Thermal-Shutdown Hysteresis T SHDN T SHDN +165 15 C C VOL IOH tRP VOUT falling (1.7% typical hysteresis) I RESET = 100A VIN = +1.0V, I RESET = 100A V RESET = 3.6V, RESET not asserted From VOUT high to RESET rising TA = +25C TA = +85C MAX1963A MAX1976A 2.2 70 80 82.5 1 30 0.001 0.01 3.2 100 5.5 160 85 100 400 1 %VOUT mV A ms SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX1963A/MAX1976A
Note 1: Limits are 100% production tested at TA = +25C. Limits over the operating temperature range are guaranteed by design. Note 2: The dropout voltage is defined as VIN - VOUT, when VOUT is 4% lower than the value of VOUT when VIN = VOUT + 0.5V.
Typical Operating Characteristics
(VIN = (VOUT + 0.5V) or 1.8V, whichever is greater; SHDN = IN, CIN = 1F, COUT = 4.7F, TA = +25C, unless otherwise noted.)
OUTPUT VOLTAGE ACCURACY vs. LOAD CURRENT
MAX1963/76 toc01
OUTPUT VOLTAGE ACCURACY vs. INPUT VOLTAGE
MAX1963/76 toc02
OUTPUT VOLTAGE ACCURACY vs. TEMPERATURE
VOUT = +1.5V OUTPUT VOLTAGE ACCURACY (%) 1.0 0.5 IOUT = 0mA, 100mA, 300mA 0 -0.5 -1.0 -1.5
MAX1963/76 toc03
0.2 OUTPUT VOLTAGE ACCURACY (%)
0.50 VOUT = 1.5V OUTPUT VOLTAGE ACCURACY (%) 0.25 IOUT = 0mA 0 IOUT = 100mA -0.25 IOUT = 300mA
1.5
0.1 VOUT = +3.0V 0 VOUT = +1.5V
-0.1
VOUT = +0.75V
-0.2 0 50 100 150 200 250 300 LOAD CURRENT (mA)
-0.50 1.4 1.8 2.2 2.6 3.0 3.4 INPUT VOLTAGE (V)
-40
-15
10
35
60
85
TEMPERATURE (C)
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3
Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN MAX1963A/MAX1976A
Typical Operating Characteristics (continued)
(VIN = (VOUT + 0.5V) or 1.8V, whichever is greater; SHDN = IN, CIN = 1F, COUT = 4.7F, TA = +25C, unless otherwise noted.)
GROUND-PIN CURRENT vs. LOAD CURRENT
MAX1963/76 toc04
GROUND-PIN CURRENT vs. INPUT VOLTAGE
MAX1963/76 toc05
GROUND-PIN CURRENT vs. TEMPERATURE
MAX1963/76 toc06
120 110 100 VOUT = +1.5V 90 VOUT = +0.75V 80 70 60 0.01 0.1 1 10 100 VOUT = +3.0V
120 100 80 60 40 20 VOUT = 1.5V 0 IOUT = 100mA IOUT = 300mA
120 110 GROUND-PIN CURRENT (A) IOUT = 100mA 100 90 80 70 60 50 IOUT = 300mA IOUT = 0mA
GROUND-PIN CURRENT (A)
GROUND-PIN CURRENT (A)
IOUT = 0mA
1000
1.2
1.6
2.0
2.4
2.8
3.2
3.6
-40
-20
0
20
40
60
80
LOAD CURRENT (mA)
INPUT VOLTAGE (V)
TEMPERATURE (C)
DROPOUT VOLTAGE vs. LOAD CURRENT
MAX1963/76 toc07
POWER-SUPPLY REJECTION RATIO vs. FREQUENCY
VOUT = +0.75V 70 60 PSRR (dB) 50 40 30 20 VOUT = +1.5V VOUT = +3.0V
MAX1963/76 toc08
120 100 VDROPOUT (mV) 80 60 VOUT = +3.0V 40 20 0 0 50 100 150 200 250 VOUT = +1.8V
80
10 0 300
IOUT = 10mA 0.1 1 10 FREQUENCY (kHz) 100 1000
LOAD CURRENT (mA)
LINE-TRANSIENT RESPONSE
MAX1963/76 toc09
LINE-TRANSIENT RESPONSE NEAR DROPOUT
MAX1963/76 toc10
VIN 3.5V
500mV/div
VIN 1.8V
500mV/div
VOUT
1.5V 10mV/div AC-COUPLED 40s/div
VOUT
1.5V 10mV/div AC-COUPLED 40s/div
4
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Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN
Typical Operating Characteristics (continued)
(VIN = (VOUT + 0.5V) or 1.8V, whichever is greater; SHDN = IN, CIN = 1F, COUT = 4.7F, TA = +25C, unless otherwise noted.)
LOAD-TRANSIENT RESPONSE NEAR DROPOUT
MAX1963/76 toc12
MAX1963A/MAX1976A
LOAD-TRANSIENT RESPONSE
MAX1963/76 toc11
200mA IOUT 20mA
200mA/div
200mA IOUT 20mA
200mA/div
VOUT
20mV/div AC-COUPLED
VOUT
20mV/div AC-COUPLED
VIN = 3.6V VOUT = 1.5V
20s/div VIN = 1.8V VOUT = 1.5V
20s/div
SHUTDOWN RESPONSE
MAX1963/76 toc13
MAX1976A SHUTDOWN/RESET RESPONSE
MAX1963/76 toc14
VSHDN 0 1V/div
VSHDN 0 VOUT 1V/div
VOUT 0 500mV/div VRESET
0
1V/div
0
1V/div
100s/div
40ms/div
MAX1976A LINE/RESET RESPONSE
MAX1963/76 toc15
VIN 0 VOUT 0 VRESET 0 2V/div
1V/div
1V/div
200ms/div
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5
Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN MAX1963A/MAX1976A
Pin Description
PIN THIN SOT23 6-PIN TDFN (3mm x 3mm) 8-PIN TDFN (2mm x 2mm) NAME FUNCTION
1
6
8
IN
Regulator Input. Supply voltage can range from +1.62V to +3.6V. Bypass IN with at least a 1F ceramic capacitor to GND (see the Capacitor Selection and Regulator Stability section). Ground. GND also functions as a heatsink. Solder to a large pad or circuitboard ground plane to maximize SOT23 power dissipation. Ground Active-Low Shutdown Input. A logic-low reduces supply current to below 1A. Connect to IN or logic-high for normal operation. Open-Drain, Active-Low Reset Output. RESET rises 3.2ms (MAX1963A) or 100ms (MAX1976A) after the output has achieved regulation. RESET falls immediately if VOUT drops below 82.5% of its nominal voltage, or if the MAX1963A/MAX1976A are shut down. Internally Connected. Leave floating or connect to GND. Regulator Output. Sources up to 300mA. Bypass with a 4.7F low-ESR ceramic capacitor to GND. No Connection. Not internally connected. Ground. EP also functions as a heatsink. Solder EP to a large pad or circuitboard ground plane to maximize TDFN power dissipation.
2 -- 3
-- 4 5
-- 5 6
GND GND SHDN
4
3
4
RESET
5 6 -- --
2 1 -- Exposed Pad
3 1 2, 7 --
I.C. OUT N.C. EP
IN SHDN
SHUTDOWN LOGIC ERROR AMP MOS DRIVER WITH ILIMIT P OUT
MAX1963A MAX1976A
THERMAL SENSOR
REF
82.5% REF TIMER
RESET
GND
Figure 1. Functional Diagram
6
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Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN
Detailed Description
The MAX1963A/MAX1976A are low-dropout, high-accuracy, low-quiescent-current linear regulators designed primarily for battery-powered applications. These devices supply loads up to 300mA and are available with preset output voltages from +0.75V to +3.0V. As illustrated in Figure 1, the MAX1963A/MAX1976A consist of a reference, an error amplifier, a p-channel pass transistor, an internal feedback voltage-divider, and a power-good comparator. The reference is connected to the error amplifier, which compares this reference with the feedback voltage and amplifies the difference. If the feedback voltage is lower than the reference voltage, the pass-transistor gate is pulled lower, which allows more current to pass to the output and increases the output voltage. If the feedback voltage is too high, the pass-transistor gate is pulled up, allowing less current to pass to the output. temperature exceeds TJ = +165C, a thermal sensor turns off the pass transistor, allowing the IC to cool. The thermal sensor turns the pass transistor on again after the junction temperature cools by 15C, resulting in a pulsed output during continuous thermal-overload conditions. Thermal-overload protection safeguards the MAX1963A/MAX1976A in the event of fault conditions. For continuous operation, do not exceed the absolute maximum junction-temperature rating of TJ = +150C.
MAX1963A/MAX1976A
Operating Region and Power Dissipation
The MAX1963A/MAX1976A maximum power dissipation depends on the thermal resistance of the IC package and circuit board, the temperature difference between the die junction and ambient air, and the rate of airflow. The power dissipated in the device is P = IOUT (VIN - VOUT). The maximum allowed power dissipation is: PMAX = (TJ(MAX) - TA) / (JC + CA) where (T J(MAX) - T A ) is the temperature difference between the MAX1963A/MAX1976A die junction and the surrounding air, JC is the thermal resistance of the junction to the case, and CA is the thermal resistance from the case through the PC board, copper traces, and other materials to the surrounding air. For best heatsinking, expand the copper connected to the exposed paddle or GND. The MAX1963A/MAX1976A deliver up to 300mA and operate with an input voltage up to +3.6V. However, when using the 6-pin SOT23 version, high output currents can only be sustained when the input-output differential voltage is less than 2V, as shown in Figure 2. The maximum allowed power dissipation for the 6-pin TDFN is 1.951W at TA = +70C. Figure 3 shows that the maximum input-output differential voltage is not limited by the TDFN package power rating.
Internal p-Channel Pass Transistor
The MAX1963A/MAX1976A feature a 0.33 (RDS(ON)) p-channel MOSFET pass transistor. Unlike similar designs using pnp pass transistors, p-channel MOSFETs require no base drive, which reduces quiescent current. The pnp-based regulators also waste considerable current in dropout when the pass transistor saturates and use high base-drive currents under large loads. The MAX1963A/MAX1976A do not suffer from these problems and consume only 90A (typ) of quiescent current under heavy loads, as well as in dropout.
Shutdown
Pull SHDN low to enter shutdown. During shutdown, the output is disconnected from the input, an internal 1.5k resistor pulls OUT to GND, RESET is actively pulled low, and the supply current drops below 1A.
RESET Output
The MAX1963A/MAX1976A microprocessor (P) supervisory circuitry asserts a guaranteed logic-low reset during power-up, power-down, and brownout conditions down to +1V. RESET asserts when VOUT is below the reset threshold and remains asserted for at least tRP after VOUT rises above the reset threshold of regulation.
Applications Information
Capacitor Selection and Regulator Stability
Capacitors are required at the MAX1963A/MAX1976A input and output for stable operation over the full temperature range and with load currents up to 300mA. Connect a 1F ceramic capacitor between IN and GND and a 4.7F low-ESR ceramic capacitor between OUT and GND. The input capacitor (CIN) lowers the source impedance of the input supply. Use larger output capacitors to reduce noise and improve load-transient response, stability, and power-supply rejection. The output capacitor's equivalent series resistance (ESR) affects stability and output noise. Use output
7
Current Limit
The MAX1963A/MAX1976A monitor and control the pass transistor's gate voltage, limiting the output current to 450mA (min). If the output exceeds ILIM, the MAX1963A/ MAX1976A output voltage drops.
Thermal-Overload Protection
Thermal-overload protection limits total power dissipation in the MAX1963A/MAX1976A. When the junction
_______________________________________________________________________________________
Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN MAX1963A/MAX1976A
MAXIMUM OUTPUT CURRENT vs. INPUT VOLTAGE (POWER DISSIPATION LIMIT)
400 MAXIMUM OUTPUT CURRENT (mA) TA = +85C TA = +70C
300 MAXIMUM RECOMMENDED OUTPUT CURRENT 6-PIN SOT23
capacitors with an ESR of 30m or less to ensure stability and optimize transient response. Surface-mount ceramic capacitors have very low ESR and are commonly available in values up to 10F. Connect CIN and COUT as close to the MAX1963A/MAX1976A as possible to minimize the impact of PC board trace inductance.
Noise, PSRR, and Transient Response
The MAX1963A/MAX1976A are designed to operate with low dropout voltages and low quiescent currents in battery-powered systems while still maintaining good noise, transient response, and AC rejection. See the Typical Operating Characteristics for a plot of PowerSupply Rejection Ratio (PSRR) versus Frequency. When operating from noisy sources, improved supplynoise rejection and transient response can be achieved by increasing the values of the input and output bypass capacitors and through passive filtering techniques. The MAX1963A/MAX1976A load-transient response (see the Typical Operating Characteristics) shows two components of the output response: a near-zero DC shift from the output impedance due to the load-current change, and the transient response. A typical transient response for a step change in the load current from 20mA to 200mA is 20mV. Increasing the output capacitor's value and decreasing the ESR attenuates the overshoot.
200
100
0 0 0.5 1.0 1.5 2.0 2.5 3.0 (VIN - VOUT) (V)
Figure 2. Power Operating Regions for the 6-Pin SOT23: Maximum Output Current vs. Input Voltage
MAXIMUM OUTPUT CURRENT vs. INPUT VOLTAGE (POWER DISSIPATION LIMIT)
400 MAXIMUM OUTPUT CURRENT (mA) TA = +85C MAXIMUM RECOMMENDED OUTPUT CURRENT 6-PIN TDFN 3mm x 3mm
300
Input-Output (Dropout) Voltage
A regulator's minimum input-output voltage difference (dropout voltage) determines the lowest usable supply voltage. In battery-powered systems, this determines the useful end-of-life battery voltage. Because the MAX1963A/MAX1976A use a p-channel MOSFET pass transistor, the dropout voltage is a function of drain-tosource on-resistance (RDS(ON) = 0.33) multiplied by the load current (see the Typical Operating Characteristics). VDROPOUT = VIN - VOUT = 0.33 IOUT The MAX1963A/MAX1976A ground current reduces to 70A in dropout.
200
100
0 0 0.5 1.0 1.5 2.0 2.5 3.0 (VIN - VOUT) (V)
Figure 3. Power Operating Regions for the 6-Pin TDFN: Maximum Output Current vs. Input Voltage
8
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Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN
Selector Guide
MAX1963A TOP MARK VOUT (V) SUFFIX SOT 0.75 0.85 0.90 1.00 1.10 1.20 1.30 1.50 1.60 1.80 1.85 2.50 2.85 075 085 090 100 110 120 130 150 160 180 185 250 285 AACJ -- AACK AACL AACM AACN AACO AACP -- AACQ AACR AACS -- TDFN (3mm x 3mm) ALM -- ALN ALO ALP ALQ ALR ALS -- ALT ALU ALV -- TDFN (2mm x 2mm) -- -- -- -- -- -- -- -- -- -- -- -- -- SOT AACU AACV AACW AACX AACY AACZ AADA AADB AADC AADD AADE AADF AADG TDFN (3mm x 3mm) ALX ALY ALZ AMA AMB AMC AMD AME AMF AMG AMH AMI AMJ TDFN (2mm x 2mm) -- -- -- -- -- -- AAD AAE -- -- -- -- -- MAX1976A TOP MARK
MAX1963A/MAX1976A
3.00 300 AACT ALW -- AADH AMK -- Note: Standard voltage options, shown in bold, are available. Contact the factory for other output voltages between 1.5V and 4.5V. Minimum order quantity is 15,000 units.
Chip Information
TRANSISTOR COUNT: 2556 PROCESS: BiCMOS
_______________________________________________________________________________________
9
Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN MAX1963A/MAX1976A
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.)
10
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Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN
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.)
MAX1963A/MAX1976A
______________________________________________________________________________________
11
Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN MAX1963A/MAX1976A
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.)
D2 D A2
N
PIN 1 ID
0.35x0.35 b
PIN 1 INDEX AREA
E DETAIL A
E2 e
[(N/2)-1] x e REF.
A1
k
C L
C L
A
L e e
L
PACKAGE OUTLINE, 6,8,10 & 14L, TDFN, EXPOSED PAD, 3x3x0.80 mm
-DRAWING NOT TO SCALE-
21-0137
G
1
2
12
______________________________________________________________________________________
6, 8, &10L, DFN THIN.EPS
Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN
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.)
MAX1963A/MAX1976A
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
0.20 0.40 0.25 MIN. 0.20 REF.
PACKAGE VARIATIONS PKG. CODE T633-1 T633-2 T833-1 T833-2 T833-3 T1033-1 T1433-1 T1433-2 N 6 6 8 8 8 10 14 14 D2 1.500.10 1.500.10 1.500.10 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 2.300.10 2.300.10 2.300.10 e 0.95 BSC 0.95 BSC 0.65 BSC 0.65 BSC 0.65 BSC 0.50 BSC 0.40 BSC 0.40 BSC JEDEC SPEC MO229 / WEEA MO229 / WEEA MO229 / WEEC MO229 / WEEC MO229 / WEEC MO229 / WEED-3 ------b 0.400.05 0.400.05 0.300.05 0.300.05 0.300.05 0.250.05 0.200.05 0.200.05 [(N/2)-1] x e 1.90 REF 1.90 REF 1.95 REF 1.95 REF 1.95 REF 2.00 REF 2.40 REF 2.40 REF
DOWNBONDS ALLOWED
NO NO NO NO YES NO YES NO
PACKAGE OUTLINE, 6,8,10 & 14L, TDFN, EXPOSED PAD, 3x3x0.80 mm
-DRAWING NOT TO SCALE-
21-0137
G
2
2
______________________________________________________________________________________
13
Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN MAX1963A/MAX1976A
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.)
PACKAGE OUTLINE 8L TDFN EXPOSED PAD, 2x2x0.80mm
21-0168
A
1
2
14
______________________________________________________________________________________
8L TDFN EXPOSED PADS EPS
Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN
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.)
MAX1963A/MAX1976A
COMMON DIMENSIONS SYMBOL A D E A1 L k A2 MIN. 0.70 1.90 1.90 0.00 0.20 MAX. 0.80 2.10 2.10 0.05 0.40
0.25 MIN. 0.20 REF.
PACKAGE VARIATIONS PKG. CODE T822-1 N 8 D2 0.700.10 E2 1.300.10 e 0.50 TYP. JEDEC SPEC MO229 b 0.250.05 [(N/2)-1] x e 1.50 REF
DOWNBONDS ALLOWED
NO
PACKAGE OUTLINE 8L TDFN EXPOSED PAD, 2x2x0.80mm
21-0168
A
2
2
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 (c) 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc.

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