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YB1210 - 300mA
Ultra-Low-Noise, High PSRR LDO Regulator
Description
The YB1210 family consists of a series of 300mA ultra-low-noise, low dropout (LDO) linear regulators especially designed for battery-powered RF and wireless applications. The YB1210 regulator achieves a low 450mV dropout at 250mA load current of 3.3V output, ultra-low output voltage noise of 15Vrms and PSRR of 57dB at 1KHz. The YB1210 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 YB1210 requires only 0.47 F output capacitor for stability with any load. The YB1210 consumes less than 1A in shutdown mode. Other features include high output voltage accuracy and current limiting protection. The YB1210 regulators are available in SOT-23 / SOT-25 / SOT-89 packages.
Features
High Accuracy +-2% Output Voltage Ultra-Low-Noise Low-Drop-Out Regulator with 1.8/2.5/2.6/2.8/3.0V/3.3V Preset Outputs Stable with 0.47F Ceramic Capacitor for Any Load Allowable Output Current: 300mA Low Quiescent Current: ~90A 450mV Dropout at 250mA 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 Circuitry
INPUT IN Cin=0.47uF ON OFF EN
YB1210
OUT
OUTPUT PRESET
Cout=0.47uF NC or Bypass GND
Cbypass =30nF
Figure 1-1. SOT-25 application circuit
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YB1210 - 300mA
Ultra-Low-Noise, High PSRR LDO Regulator
Figure 1-2. SOT-23 / SOT-89 application circuit
Pin Configuration
Pin Description
Table 1
Pin 1 2 3 4 5 Pin 1 2 3
Name IN GND EN N.C. or Bypass OUT Name GND OUT IN
SOT-25 Description Unregulated Input Supply Ground Pin Pull High To Enable The Regulator No Connection For Normal Operation Or Noise Bypass For Ultra-Low-Noise Operation By A 30nF Cap. To GND Regulated Voltage Output SOT-23 Description Ground Pin Regulated Voltage Output Unregulated Input Supply
Pin 1 2 3 Pin 1 2 3
Name GND IN OUT Name OUT GND IN
SOT-89 Description Ground Pin Unregulated Input Supply Regulated Voltage Output SOT-89R Description Regulated Voltage Output Ground Pin Unregulated Input Supply
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YB1210 - 300mA
Ultra-Low-Noise, High PSRR LDO Regulator
Ordering Information
Marking Information
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YB1210 - 300mA
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 (SOT-23/25, JA).......... 280/W Thermal Resistance (SOT-89, JA)............... 180/W Internal Power Disspation (SOT-23/25, PD)........0.4W Internal Power Disspation (SOT-89, PD)...........0.55W
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 + 1 V ), CIN = COU T = 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 = 250mA VOUT = 3.0V, IOUT = 250mA
1.8 -2.0 200 450 470 500 520 540 800 90 0.3 1.2 ~0.01
250 550 590 600 620 640 900 150 0.5 3
Dropout Voltage (See Note 1)
VOUT = 2.8V, IOUT = 250mA VOUT = 2.6V, IOUT = 250mA VOUT = 2.5V, IOUT = 250mA VOUT = 1.8V, IOUT = 250mA
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 250mA EN=0V
A %/V % A
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YB1210 - 300mA
Ultra-Low-Noise, High PSRR LDO Regulator
f = 100Hz, IOUT=1mA Ripple Rejection (PSRR) f = 1KHz, IOUT=1mA f = 10KHz, IOUT=1mA f = 100Hz to 100KHz, Output Noise Voltage Iload=10mA, Bypass=0nF f = 100Hz to 100KHz, Iload=10mA, Bypass=30nF Shutdown Exit Delay (See Note 2) EN Logic Low Level EN Logic High Level EN Input Bias Current Thermal Shutdown Thermal-Shutdown Hysteresis Rload=50ohm VIN=2.0V to 5.5V VIN=2.0V to 5.5V VIN=5.5V, SHDN=0V or 6V Shutdown Temperature 1.2
55 57 55 45 Vrms dB
15 45 300 0.4 VIN 0.01 160 20
Vrms s V V A
Note1 : The drop out voltage varies depending on output voltage selection 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+0.5V), CIN=COUT=0.47F, VEN=VIN, unless otherwise noted.
Ground Current vs. Input Voltage
140
Dropout Voltage vs Load Current
900 800
Dropout Voltage (m V)
700 600 500 400 300 200 100 0 0 10 30 50 70 90
Vo=1.8V Vo=2.5V
Ground Current (A)
120 100 80 60 40 20 0 0.0 1.0 2.0 3.0 4.0 5.0
Vo=3.3V
Vo=3.3V
Input Voltage (V)
110 130 150 170 190 210 230 250
Load Current (m A)
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YB1210 - 300mA
Ultra-Low-Noise, High PSRR LDO Regulator
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
Temperature ( )
55
65
75
85
Dropout Voltage vs Temperature
700 600 500 400 300 200 100 0 0 10 30 50 70 90 110 130 150 170 190 210 230 250
Dropout Voltage (m V)
Vo=2.8V
85
25
Load Current (m A)
Shutdown Exit Delay
Vo=2.84V RLoad=50
Shutdown Voltage
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YB1210 - 300mA
Ultra-Low-Noise, High PSRR LDO Regulator 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
Shutdown Delay
Shutdown Voltage
Vout
RLoad=50
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YB1210 - 300mA
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 YB1210 is an ultra-low-noise, low-quiescent current, low-dropout linear regulator. It is supplied in a SOT-23 / SOT-25 / SOT-89 package for different applications. These devices can supply loads up to 250mA. As shown in the Functional Block Diagram, the YB1210 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
YB1210 MRev.1.5
feedback voltage is too high, the pass 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 YB1210 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 YB1210 will remain stable and in regulation with no load, unlike many other voltage regulators. Internal P-Channel Pass Transistor The YB1210 features a low impedance P-channel MOSFET pass transistor. This provides several advantages over similar
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YB1210 - 300mA
Ultra-Low-Noise, High PSRR LDO Regulator designs using a PNP pass transistor, including low operating power and longer battery life. The YB1210 consumes only 90A of quiescent current under most conditions. Output Short-Circuit Current Limit The YB1210 includes a current limiter, which monitors and controls the pass transistor's gate voltage, limiting the output current to about 200mA, for example, in a short-circuit output situation. Shutdown The YB1210 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 YB1210 includes a soft-start circuitry to limit inrush current at turn-on. During power
YB1210 MRev.1.5
up, the output capacitor and output load are charged with a reduced output current. Shortly after the initial power up, the soft-start feature is terminated and normal operation is resumed.
Application Information
Enable/Shutdown The YB1210 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 YB1210 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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YB1210 - 300mA
Ultra-Low-Noise, High PSRR LDO Regulator
SOT-25 Package Information
YB1210 MRev.1.5
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YB1210 - 300mA
Ultra-Low-Noise, High PSRR LDO Regulator
SOT-23 Package Information
NOTE: 1. ALL DIMENSIONS ARE IN MILLIMETERS. 2. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSION OR GATE BURRS SHALL NOT EXCEED 0.25mm PER END. DIMENSION E1 DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. INTERLEAD FLASH OR PROTRUSION SHALL NOT EXCEED 0.25 PER SIDE. 3. THE PACKAGE TOP MAY BE SMALLER THAN THE PACKAGE BOTTOM. DIMENSIONS D AND E1 ARE DETERMINED AT THE OUTERMOST EXTREMES OF THE PLASTIC BODY EXCLUSIVE OF MOLD FLASH, THE BAR BURRS. GATE BURRS AND INTERLEAD FLASH, BUT INCLUDING ANY MISMATCH BETEEN THE TOP AND BOTTOM OF THE PLASTIC BODY.. 4. DIMENSION"b" 5. DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.08mm TOTAL IN EXCESS OF THE "b"DIMENSION AT MAXIMUM MATERIAL CONDITION. THE DAMBAR CANNOT BE LOCATED ON THE LOWER RADIUS OF THE FOOT . MINMUM SPACE BETWEEN PROTRUSION AND AN ADJACENT LEAD SHALL NOT BE LESS THAN 0.07mm 5. LEAD FRAME MATERIAL:EFTEC 64T
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YB1210 - 300mA
Ultra-Low-Noise, High PSRR LDO Regulator
SOT-89 Package Information
YB1210 MRev.1.5
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