LP5952_15 Datasheet, PDF (1/22 Pages) Texas Instruments – 350mA Dual Rail Linear Regulator

LP5952
www.ti.com
SNVS469E – OCTOBER 2006 – REVISED MAY 2013
350mA Dual Rail Linear Regulator
Check for Samples: LP5952
FEATURES
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•2 Excellent load transient response: ±15mV
typical
• Excellent line transient response: ±1mV typical
• 0.7V ≤ V_IN ≤ 4.5V
• 2.5V ≤ V_BATT ≤ 5.5V
• 0.5V ≤ V_OUT ≤ 2.0V
• For I_LOAD = 350mA:
– V_BATT ≥ V_OUT(NOM) + 1.5V or 2.5V whichever
is higher
• For I_LOAD = 150mA:
– V_BATT ≥ V_OUT(NOM) + 1.3V or 2.5V whichever
is higher
• 50µA typical quiescent current from V_BATT
• 10µA typical quiescent current from V_IN
• 0.1µA typical quiescent current in shutdown
• Ensured 350mA output current
• Noise voltage = 100µV_RMS typical
• Operates from a single Li-Ion cell or 3 cell
• NiMH/NiCd batteries
• Only one or two tiny surface-mount external
components required depending on
application
• Small, thin 5-bump DSBGA package and 6-pin
Chip On Lead USON package, lead free
• Thermal-overload and short-circuit protection
• -40°C to +125°C junction temperature range
APPLICATIONS
• Mobile Phones
• Hand-Held Radios
• Personal Digital Assistants
• Palm-Top PCs
• Portable Instruments
• Battery Powered Devices
DESCRIPTION
The LP5952 is a Dual Supply Rail Linear Regulator
optimized for powering ultra-low voltage circuits from
a single Li-Ion cell or 3 cell NiMH/NiCd batteries.
In the typical post regulation application V_BATT is
directly connected to the battery (range 2.5V...5.5V)
and V_IN is supplied by the output voltage of the DC-
DC Converter (range 0.7V...4.5V).
The device offers superior dropout and transient
features combined with very low quiescent currents.
In shutdown mode (Enable pin pulled low) the device
turns off and reduces battery consumption to 0.1µA
(typ.).
The LP5952 also features internal protection against
over-temperature, over-current and under-voltage
conditions.
Performance is specified for a -40°C to 125°C
junction temperature range.
Typical Application Circuit
V_BATT
3.0V to 5.5V
4.7 PF
V_OUTDCDC
V_IN
GND
A
1
B2
LM3671
TL-1.8
A
3
SW
L1: 2.2 PH
1.8V
10 PF
EN
C1
FB
C3
V_{BATT C1}
A
3
LP5952
V_{IN A}
1
V_OUT
2.2 PF
EN _C3
B2 ^GND
1.5V
Load
0...350 mA
Figure 1. Typical Application Circuit with DC-DC Converter as Pre-Regulator for V_IN
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006–2013, Texas Instruments Incorporated