Library: Ultra Noise, High PSRR, Power, 30mA Very Dropout Voltage Regu

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Library: Ultra Noise, High PSRR, Power, 30mA Very Dropout Voltage Regu

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LDO_512
Library: Ultra Noise, High PSRR, Power, 30mA Very Dropout Voltage Regulators
REGULATOR VERY DROPOUT VOLTAGE 30mV ULTRA OUTPUT VOLTAGE NOISE HIGH PSRR 70dB STAND-BY CURRENT 20µA QUIESCENT CURRENT 150µA FULL LOAD CURRENT POWER DOWN MODE SHORT CIRCUIT PROTECTION SMALL DECOUPLING CERAMIC CAPACITOR BIPOLAR INPUT STAGE
APPLICATION NOTE external capacitor (COUT 1µF) with equivalent serial resistance (ESR) range 0.02 used regulator stability. Figure Block Diagram
PWRDWN STDBY
VREF
TYPICAL APPLICATIONS Cellular Cordless phones supplied cell Lithium-ion battery cells Ni-MH Ni-Cd battery (Personal Digital Assistant) Smart phone Portable equipment Supply devices cellular phone Figure Typical Application Circuit
LDO_512
VOUT
Power Down Mode Stand-by Mode Stand-by Mode Active Mode
PWRDWN
LDO_512
COUT
STDBY
June 2002
This advance information product development undergoing evaluation. Details subject change without notice.
LDO_512
ELECTRICAL CHARACTERISTICS 5.5V, -30°C +85°C, VREF 2.8V, 0.8µF COUT 1.2µF, 0.6. 100µA ILOAD 30mA. Typical case 25°C, IOUT 15mA.
Parameter Input Voltage Range (Note Output Voltage Output current PMOS Output Resistance Input Current Dropout Voltage Symbol VOUT IOUT ILOAD 30mA, VOUT 50mV (Note Quiescent current ISTDBY PSRR ILOAD 100µA ILOAD 30mA Stand-by current Power down mode quiescent current Power Supply Rejection Ratio Power Supply Rejection Ratio stand-by mode Load Regulation Line Regulation ILOAD 100µA Power down active 100KHz ILOAD 30mA, 5.1V, VOUT 2.8V Line Transcient LIRT VOUT 2.8V, IOUT 30mA, 300mV tRISE tFALL 10µs Load Transcient LDTR VOUT 2.8V, tRISE tFALL 10µs 100µA ILOAD 30mA Recovery time Output Voltage Noise 100Hz 1KHz 1KHz 100KHz 100KHz Output Decoupling Capacitor Settling Time (from power down active mode) Short Circuit Current Limit ISHORT VOUT 2.8V, COUT Test Condition Min. Typ. Max. Unit
PSRRSTY 100kHz
Notes: Above characteristics given minimum input operating range voltage, regulator operational with 2.7V minimum input voltage. parameters guaranteed with 170mV Dropout voltage.
LDO_512
TYPICAL CHARACTERISTICS Figure PSRR Frequency (Iload min)
Figure Noise Frequency (Iload min)
NOISE (nVrms)
PSRR (dB)
1000
10000
100000
1000
10000
100000
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure Load Transient (rising egde)
Figure Load Transient (falling egde)
Figure Load Transient Std-by mode (rising egde)
Figure Load Transient Std-by mode (falling egde)
LDO_512
Figure Output Voltage Input Voltage (Line Regulation)
2810
Figure Output Voltage Input Voltage (Line Regulation Stand-by mode)
2813
load
OUTPUT VOLTAGE (mV)
2805
load
OUTPUT VOLTAGE (mV)
2812
Iload=100µA
2800
Iload=15mA
2811
2795
Iload=30mA
2790
2810
INPUT VOLTAGE
INPUT VOLTAGE
Figure Line Transient (rising egde Iload max)
Figure Line Transient (falling egde Iload max)
Figure Output Voltage Output Current (Load Regulation)
2805
Figure Output Voltage Output Current (Load Regulation Stand-by mode)
2813
OUTPUT VOLTAGE (mV)
2800
OUTPUT VOLTAGE (mV)
2812
Vin=5.1V
Vin=5.1V
2795
2811
Vin=3.0V
Vin=3.0V
2790
2810
OUTPUT CURRENT (mA)
OUTPUT CURRENT (µA)
LDO_512
Information furnished believed accurate reliable. However, STMicroelectronics assumes responsibility consequences such information infringement patents other rights third parties which result from use. license granted implication otherwise under patent patent rights STMicroelectronics. Specifications mentioned this publication subject change without notice. This publication supersedes replaces information previously supplied. STMicroelectronics products authorized critical components life support devices systems without express written approval STMicroelectronics. logo registered trademark STMicroelectronics 2002 STMicroelectronics Rights Reserved STMicroelectronics GROUP COMPANIES Australia Brazil Canada China Finland France Germany Hong Kong India Israel Italy Japan Malaysia Malta Morocco Singapore Spain Sweden Switzerland United Kingdom United States http://www.st.com

Library: Ultra Noise, High PSRR, Power, 30mA Very Dropout Voltage Regu

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