View LDO51_225118.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

LDO_51
IP Library: High PSRR, Low power, 80mA Low Dropout Voltage Regulator
PRODUCT PREVIEW
s ANALOG BASEBAND REGULATOR s VERY LOW DROPOUT VOLTAGE : 50mV s HIGH PSRR : 60dB s LOW QUIESCENT CURRENT : 130A s LOW OUTPUT VOLTAGE NOISE s NO CURRENT IN POWER DOWN MODE s SHORT CIRCUIT PROTECTION s SMALL DECOUPLING CERAMIC CAPACITOR
TYPICAL APPLICATIONS - Cellular and Cordless phones supplied by 1 cell Lithium-ion battery / 3 cells Ni-MH or Ni-Cd battery. - PDA (Personal Digital Assistant), Smart phone. - Portable equipment. - Supply for Analog and Mixed-signal devices for cellular phone. Figure 2 : Typical Application Circuit VIN IN
APPLICATION NOTE An external capacitor (COUT = 1F) with an equivalent serial resistance (ESR) in the range 0.02 to 0.6 is used for regulator stability. Figure 1 : Block Diagram
IN
?
? OUT
PWRDWN
?
VREF
LDO_51
?
?
OUT
VOUT
Power Down Mode
PWRDWN ON
1F
? LDO_51
ESR COUT
OFF ? GND
June 2002
This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
1/4
LDO_51
ELECTRICAL CHARACTERISTICS 3V < VIN < 5.5V, -55C < TA < +125C, VREF = 2.8V, 0.8F < COUT < 1.2F, 20m < ESR < 0.6. 100A < ILOAD < 80mA. Typical case : VIN = 4V, T = 25C, IOUT = 40mA.
Parameter Input Voltage Range (Note 1) Output Voltage Output Voltage Accuracy Output current PMOS Output Resistance Dropout Voltage IOUT RON VDO VOUT = 50mV, ILOAD = 80mA (Note 2) Quiescent current IQ ILOAD = 100A ILOAD = 80mA Power down mode quiescent current Power Supply Rejection Ratio PSRR f < 10KHz f < 100KHz Line Regulation Load Regulation Line Transient Load Transient Lir Ldr Lirt Ldtr VIN = 300mV tRISE = tFALL = 10s 10% to 90% and 90% to 10% of 80mA in 10s 100Hz 1KHz 100KHz Output decoupling Capacitor Settling time Short Circuit Current Limit ISHORT COUT From power down to active mode 180 230 1 25 300 1 mV ILOAD = 80mA, VIN = 3V to 5.1V 30 45 1 mV mV 50 40 60 50 3 6 mV dB IQPDM Power down active 170 30 130 100 50 170 nA A Symbol VIN VOUT -3 0,1 Test Condition Min 3 2,8 3 80 0,5 50 Typ Max 5,5 Unit V V % mA mV
Output Noise Voltage
en
1,5 550 300
V ----------Hz nV ----------Hz F s mA
Notes: 1. Above characteristics are given for 3V minimum input operating range voltage, but regulator is operational with 2.7V minimum input voltage. 2. All parameters are guaranteed with 170mV Dropout voltage.
2/4
LDO_51
TYPICAL CHARACTERISTICS Figure 3 : Line transient Figure 4 : Settling Time
Figure 5 : Load Transient (rising edge)
Figure 6 : Load Transient (falling edge)
Figure 7 : PSRR vs Frequency (ILOAD max - VIN min)
60
Figure 8 : Noise vs Frequency (ILOAD max - VIN min)
650 600 550
50
500 450
NOISE (nVrms)
NOISE (nVrms)
1000 10000 100000
400 350 300 250 200
40
30
150 100 50
20 100
0 100
1000
10000
100000
FREQUENCY (Hz)
FREQUENCY (Hz)
3/4
LDO_51
Figure 9 : Current Consumption vs Output Current (VIN = 4V)
120
CURRENT CONSUMPTION (A)
100
80
60
40
20 0.02 0.1 10 20 30 40 50 60 70 80
OUTPUT CURRENT (mA)
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics (c) 2002 STMicroelectronics - All Rights Reserved STMicroelectronics GROUP OF 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
4/4

▲Up To Search▲

Price & Availability of LDO51

	To Download LDO51 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .