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YB1200 - High Accuracy
Ultra-Low-Noise, High PSRR LDO Regulator Description
The YB1200 family consists of a series of 150mA ultra-low-noise, low dropout (LDO) linear regulators especially designed for battery-powered RF and wireless applications. The YB1200 regulator achieves a low 250mV dropout at 150mA load current of 3.3V output, ultra-low output voltage noise of 15Vrms and PSRR of 57dB at 1KHz. The YB1200 regulators are also optimized to work with low-ESR and low cost ceramic capacitors reducing the amount of board space critical in hand-held devices. The YB1200 requires only 0.47 F output capacitor for stability with any load. The YB1200 consumes less than 1A in shutdown mode. Other features include high output voltage accuracy and current limiting protection. The YB1200 regulators are available in a tiny SC-70 / SC-82 package.
Features
High Accuracy +-2% Ultra-Low-Noise Low-Drop-Out Regulator with 1.8/2.5/2.6/2.8/3.0/3.3V Preset Outputs Stable with 0.47F Ceramic Capacitor for Any Load Typical Output Current: 150mA Low Quiescent Current: ~90A 250mV Dropout at 150mA Load (3.3V) Only Need Input and Output Capacitors Power Saving Shutdown Mode (<1A) Thermal Protection Shutdown Built-In Internal Soft-Start Output Short-circuit Current Limit Protection Green package (RoHS) available
Applications
PDA, Palmtops and Notebook Computers DSC, Handset Camera Modules PCMCIA Cards, PC Cameras USB Based Portable Devices (MP3, PMP) GSM/GPRS/3G RF Transceiver Modules Wireless LANs, Bluetooth Portable Radios
Typical Application Circuit
INPUT IN Cin=0. 47 uF ON OFF EN
YB1200
OUT
OUTPUT PRESET
NC or Bypass
GND
Cout=0. 47 uF
Cbypass =30nF
Figure 1-1. SC-70 application circuit YB1200 MRev.1.4 www.yobon.com.tw 1
YB1200 - High Accuracy
Ultra-Low-Noise, High PSRR LDO Regulator
INPUT IN Cin=0. 47 uF ON OFF EN
YB1200
OUT
OUTPUT PRESET
Cout=0. 47 uF
GND
Figure 1-2. SC-82 application circuit
Pin Configuration
SC-70
Figure 2. Pin configuration
Pin Description
Table 1
Pin 1 2 3 4 5 Pin 1 2 3 4
Name IN GND EN N.C. Bypass OUT Name EN GND OUT IN Pull high to enable the regulator. Ground pin. Regulated Output Voltage. Unregulated Input Supply. Unregulated Input Supply. Ground pin. Pull high to enable the regulator.
SC-70 Description
No external connection needed for normal operation. Noise Bypass for Ultra-Low-Noise Operation by connecting a 30nF capacitor from Bypass to GND. Regulated Output Voltage. Bypass with a capacitor to GND. SC-82 Description
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YB1200 - High Accuracy
Ultra-Low-Noise, High PSRR LDO Regulator Ordering Information
Table 2
YB1200 Order Information Output Voltage Grade Order Information SC70-5 Small Package 1.8 2.5 2.6 2.8 3.0 3.3 Green Package+ Standard Green Package+ Standard Green Package+ Standard Green Package+ Standard Green Package+ Standard Green Package+ Standard YB1200SC70S-1.8G YB1200SC70S-2.5G YB1200SC70S-2.6G YB1200SC70S-2.8G YB1200SC70S-3.0G YB1200SC70S-3.3G SC-82 Small Package 1.8 2.5 2.6 2.8 3.0 3.3 Green Package+ Standard Green Package+ Standard Green Package+ Standard Green Package+ Standard Green Package+ Standard Green Package+ Standard YB1200SC82S-1.8G YB1200SC82S-2.5G YB1200SC82S-2.6G YB1200SC82S-2.8G YB1200SC82S-3.0G YB1200SC82S-3.3G DA DB DE DC DF DD 3000 Units Tape & Reel 3000 Units Tape & Reel 3000 Units Tape & Reel 3000 Units Tape & Reel 3000 Units Tape & Reel 3000 Units Tape & Reel BA BB BE BC BF BD 3000 Units Tape & Reel 3000 Units Tape & Reel 3000 Units Tape & Reel 3000 Units Tape & Reel 3000 Units Tape & Reel 3000 Units Tape & Reel Package Marking Supplied as:
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YB1200 - High Accuracy
Ultra-Low-Noise, High PSRR LDO Regulator Absolute Maximum Ratings
Supply Voltage........................................ -0.3V to 7.0V Output Voltage ...............................-0.3V to (VIN+0.3V) Output Short-Circuit Duration ........................... Infinite Junction Temperature Range........................... +150 Storage Temperature Range ............. -65 to +150 Lead Temperature............................................ +250 Thermal Resistance (SC-70/82, JA) ............ 330/W Internal Power Disspation (SC-70/82, PD).........0.3W
Recommended Operating Conditions
Input Supply Voltage................................ 2V to 6.0V Operating Temperature..................... -40 to +85
ESD Susceptibility (HBM)...........................................2KV ESD Susceptibility (MM)........................................... 200V
Electrical Characteristics
Table 3 TA = 25 , VIN = ( VOUT + 1V ), CIN = COUT = 0.47F, VEN = VIN
Function Parameter Input Voltage Range Output Voltage Output Voltage Accuracy Output Current Limit
Conditions
Min 2.0
Typ
Max 6.0 3.3 +2.0
Units V V % mA
Predefined (metal masks) IOUT = 10mA Short-circuit output VOUT = 3.3V, IOUT = 150mA VOUT = 3.0V, IOUT = 150mA
1.8 -2.0 200 250 275 300 310 320 500 90 0.3 1.2 ~0.01
Dropout Voltage (See Note 1)
VOUT = 2.8V, IOUT = 150mA VOUT = 2.6V, IOUT = 150mA VOUT = 2.5V, IOUT = 150mA VOUT = 1.8V, IOUT = 150mA
mV
Ground Current Line Regulation Load Regulation Shutdown Supply Current
IOUT = 0 mA VIN = (VOUT + 1V) to 6.0V, IOUT = 10 mA IOUT = 1mA to 150mA EN=0V
A %/V % A
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YB1200 - High Accuracy
Ultra-Low-Noise, High PSRR LDO Regulator
f = 100Hz, IOUT=1mA Ripple Rejection (PSRR) f = 1KHz, IOUT=1mA f = 10KHz, IOUT=1mA Output Noise Voltage Shutdown Exit Delay (See Note 2) EN Logic Low Level EN Logic High Level EN Input Bias Current Thermal Shutdown Thermal-Shutdown ysteresis Note1 : The drop out voltage varies depending on output voltage selection f = 100Hz to 100KHz, Iload=10mA, Bypass=0nF f = 100Hz to 100KHz, Iload=10mA, Bypass=30nF Rload=50ohm VIN=2.0V to 5.5V VIN=2.0V to 5.5V VIN=5.5V, EN=0V or 6V Shutdown Temperature 1.2
52 55 53 45 15 45 300 0.4 VIN 0.01 160 20 Vrms Vrms s V V A dB
Dropout is defined as VIN - VOUT when VOUT is 100mV below VOUT where Vin=Vout +1V for nominal VOUT. Note 2: Time needed for VOUT to reach 90% of final value.
Typical Characteristics
At TA= 25, VIN = ( VOUT + 1V), CIN = COUT = 0.47F, VEN = VIN, unless otherwise noted.
Dropout Voltage vs Load Current
600
Dropout Voltage vs Temperature
400
Dropout Voltage (m V)
Vo=1.8V
400 300 200 100 0 0 10 30 50 70 90 110 130 150
D ropout V oltage (m V )
500
350 300 250 200 150 100 50 0 0
Vo=2.8V
85
Vo=2.5V
25
Vo=3.3V
Load Current (m A)
10
30
50
70
90
110
130
150
Load Current (m A)
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YB1200 - High Accuracy
Ultra-Low-Noise, High PSRR LDO Regulator
ILOAD=1mA
Output Voltage vs. Temperature
2.89 2.88
Output Voltage (V)
2.87 2.86 2.85 2.84 2.83 2.82 2.81 25 35 45
ILoad=1mA
ILoad=80mA
55 65 75 85
Temperature ( )
Ground Current vs. Input Voltage
140
Ground Current (A)
120 100 80 60 40 20 0 0.0 1.0 2.0 3.0 4.0 5.0
Input Voltage (V)
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YB1200 - High Accuracy
Ultra-Low-Noise, High PSRR LDO Regulator
Shutdown Exit Delay
Shutdown Delay
Shutdown Voltage Vo=2.84V RLoad=50 Shutdown Voltage Vo RLoad=50
Line Transient Response
5V
Load Transient Response
3.34V CIN = 0.47F COUT = 0.47F ILoad = 100A 100mA 100A
CIN = 0.47F COUT = 0.47F VIN = 3.34V
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YB1200 - High Accuracy
Ultra-Low-Noise, High PSRR LDO Regulator Functional Block Diagram
IN
EN
SHUTDOWN AND POWER-ON CONTROL ERROR AMP MOS DRIVER WITH LIMIT
P OUT
THERMAL SENSOR
REFERENCE AND NOISE BYPASS
GND
Figure 3. Block Diagram
Functional Description
The YB1200 is an ultra-low-noise, low-quiescent current, low-dropout linear regulator. It is supplied in a SC-70 and SC-82 package for space and noise sensitive applications. These devices can supply loads up to 150mA. As shown in the Functional Block Diagram, the YB1200 consists of a reference and noise bypass circuit, error amplifier, output drive transistor, internal feedback voltage divider, thermal sensor, and short circuit current limiter. The internal reference is connected to the error amplifier's inverting input. The error amplifier 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 low. This allows more current to pass to the output and increases the output voltage. If the feedback voltage is too high, the pass
YB1200 MRev.1.4
transistor gate is pulled high, allowing less current to pass to the output. The parts are available with preset output voltages ranging from 1.8V to 3.3V. Stability The YB1200 is a high performance LDO emphasizing stability with low output capacitance. It is able to maintain stability with an output capacitor as low as 0.47uF. The output capacitor can also be increased to optimize performance. The YB1200 will remain stable and in regulation with no load, unlike many other voltage regulators. Internal P-Channel Pass Transistor The YB1200 features a low impedance P-channel MOSFET pass transistor. This provides several advantages over similar designs using a PNP pass transistor, including low operating power and longer
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YB1200 - High Accuracy
Ultra-Low-Noise, High PSRR LDO Regulator
battery life. The YB1200 consumes only 90A of quiescent current under most conditions. Output Short-Circuit Current Limit The YB1200 includes a current limiter, which monitors and controls the pass transistor's gate voltage, limiting the output current to about 200 mA, for example, in a short-circuit output situation. Shutdown The YB1200 also features a low-power active shutdown mode. It has a switch that turns off the device when disabled. This allows the output capacitor and load to discharge and de-energize the load. In the shutdown mode, the internal functional blocks, such as voltage reference and the error amplifier, are turned off completely, and the quiescent current is less than 1A. Thermal Protection Shutdown The thermal protection shutdown function protects the device from operating in over temperature condition. When the junction temperature exceeds +160C, the thermal sensor signals the shutdown logic, turning off the pass transistor and allowing the IC to cool down. The thermal sensor turns the pass transistor on again after the IC's junction temperature drops to +140C. Soft-Start Circuitry The YB1200 includes a soft-start circuitry to limit inrush current at turn-on. During power up, the output capacitor and output load are charged with a reduced output current.
YB1200 MRev.1.4
Shortly after the initial power up, the soft-start feature is terminated and normal operation is resumed.
Application Information
Enable/Shutdown The YB1200 comes with an active-high enable pin that allows the regulator to be enabled. Forcing the enable pin low disables the regulator and puts it into the shutdown mode. This pin cannot be left floating as it may cause an undetermined state. Input/Output Capacitor It is recommended to use a 0.47F capacitor on the YB1200 input and a 0.47F capacitor on the output. For high regulation performance, larger input capacitor values and lower ESRs provide better noise rejection and line-transient response. The output noise, load-transient response, stability, and power-supply rejection can be improved by using large output capacitors. Low ESR ceramic capacitors provide optimal performance and save space. Power Supply Rejection and Transient Response The PSRR and transient response can be improved by increasing the values of the input and output bypass capacitors, and through passive filtering techniques.
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YB1200 - High Accuracy
Ultra-Low-Noise, High PSRR LDO Regulator SC-70 Package Information
Symbol A A1 A2 b C D E E1 e e1 L
Millimeters MIN. 0.90 0.025 0.875 0.20 0.10 1.90 1.15 2.00 0.65 BSC. 1.30 BSC. 0.425 REF. MAX. 1.10 0.10 1.00 0.40 0.15 2.10 1.35 2.20 MIN. .036 .001 .035 .008 .004 .076 .046 .080
Inches MAX. 0.44 .004 .040 .016 .006 .084 .054 .088 .026 BSC. .052 BSC. .017 REF.
Note: 1. All dimensions are in millimeters, and the dimensions in inches are for reference only. 2. 1mm=40mils=0.04inches
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YB1200 - High Accuracy
Ultra-Low-Noise, High PSRR LDO Regulator SC-82 Package Information
NOTE: 1. CONTROLUNG DIMENSION: mm 2. LEAD FRAME MATERIAL:EFTEC-64T 1/2H OR H. 3. DIMENSION D DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS, MOLD FLASH/PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.15 mm PER SIDE, 4. DIMENSION E1 DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. INTERLEAD FLASH OR PROTRUSION SHALL NOT EXCEED 0.15mm PER SIDE.
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