LP3988 Datasheet, PDF (1/25 Pages) National Semiconductor (TI) – Micropower, 150mA Ultra Low-Dropout CMOS Voltage Regulator With Power Good

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LP3988
SNVS161E – OCTOBER 2001 – REVISED OCTOBER 2015
LP3988 Micropower, 150-mA Ultra-Low-Dropout CMOS Voltage Regulator
With Power Good
1 Features
•1 Input Voltage Range: 2.5 V to 6 V
• Output Current: 150 mA
• PSRR at 10 kHz: 40 dB
• Quiescent Current When Shut Down: ≤ 1µA
• Fast Turnon Time: 100 µs (Typical)
• Dropout With 150-mA load: 80 mV (Typical)
• Junction Temperature Range for Operation:
−40°C to +125°C
• Power-Good Flag Output
• Logic Controlled Enable
• Thermal Shutdown and Short-Circuit Current Limit
• Stable with Ceramic and High-Quality Tantalum
Capacitors
2 Applications
• CDMA Cellular Handsets
• Wideband CDMA Cellular Handsets
• GSM Cellular Handsets
• Portable Information Appliances
• Tiny 3.3 V ± 5% to 2.85 V, 150-mA Converter
3 Description
The LP3988 is a 150-mA low dropout regulator
designed specially to meet requirements of portable
battery applications. The LP3988 is designed to work
with space-saving, small 1-µF ceramic capacitors.
The LP3988 features a Power Good (PG) output that
indicates a faulty output condition. The device is ideal
for mobile phone and similar battery-powered
wireless applications. It provides up to 150 mA output
current from a 2.5-V to 6-V input, consuming less
than 1 µA in disable mode and has fast turnon time
less than 200 µs.
The LP3988 device's performance is optimized for
battery-powered systems to deliver low noise,
extremely low dropout voltage, and low quiescent
current. Regulator ground current increases only
slightly in dropout, further prolonging the battery life.
Power supply rejection is better than 60 dB at low
frequencies and starts to roll off at 10 kHz. High
power-supply rejection is maintained down to lower
input-voltage levels common to battery-operated
circuits.
The LP3988 is available in a 5-pin SOT-23 package
and a 5-pin thin DSBGA package. Performance is
specified for −40°C to +125°C temperature range. For
all available output voltage and package options, see
the Package Option Addendum (POA) at the end of
the data sheet.
Device Information⁽¹⁾
PART NUMBER PACKAGE
BODY SIZE (NOM)
LP3988
SOT-23 (5)
DSBGA (5)
2.90 mm × 1.60 mm
1.502 mm × 1.045 mm⁽²⁾
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
(2) Body size dimension is maximum.
Simplified Schematic
V_IN
IN
OUT
R_PG
C_IN
LP3988
V_OUT
C_OUT
V_EN
ON
OFF
EN
PG
GND
V_PG
V_OUT OK
ERROR
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.