LP38852-ADJ_16 Datasheet, PDF (1/33 Pages) Texas Instruments – 1.5-A Fast-Response High-Accuracy Adjustable LDO Linear Regulator

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LP38852-ADJ
SNVS482F – JANUARY 2007 – REVISED DECEMBER 2015
LP38852-ADJ 1.5-A Fast-Response High-Accuracy Adjustable LDO Linear Regulator With
Enable and Soft-Start
1 Features
•1 Input V_IN Range 0.93 V to 5.5 V
• Adjustable V_OUT Range 0.8 V to 1.8 V
• Wide V_BIAS Supply Operating Range 3 V to 5.5 V
• Dropout Voltage of 130 mV (Typical) at 1.5-A
Load Current
• Precision Output Voltage Across All Line and
Load Conditions:
– ±1.5% V_ADJ for T_J = 25°C
– ±2% V_ADJ for 0°C ≤ T_J ≤ +125°C
– ±3% V_ADJ for –40°C ≤ T_J ≤ +125°C
• Overtemperature and Overcurrent Protection
• Stable with 10-µF Ceramic Capacitors
• Available in 7-pin TO-220, 7-Pin DDPAK/TO-263,
and 8-Pin SO PowerPAD™ Packages
• −40°C to +125°C Operating Junction Temperature
Range
2 Applications
• ASIC Power Supplies In:
– Desktops, Notebooks, and Graphics Cards,
Servers
– Gaming Set Top Boxes, Printers and Copiers
• Server Core and I/O Supplies
• DSP and FPGA Power Supplies
• SMPS Post-Regulator
3 Description
The LP38852-ADJ is a high-current, fast-response
regulator which can maintain output voltage
regulation with extremely low input-to-output voltage
drop. Fabricated on a CMOS process, the device
operates from two input voltages: V_BIAS provides
voltage to drive the gate of the N-MOS power
transistor, while V_IN is the input voltage which
supplies power to the load. The use of an external
bias rail allows the part to operate from ultralow V_IN
voltages. Unlike bipolar regulators, the CMOS
architecture consumes extremely low quiescent
current at any output load current. The use of an N-
MOS power transistor results in wide bandwidth, yet
minimum external capacitance is required to maintain
loop stability.
The fast transient response of this device makes it
suitable for use in powering DSP, microcontroller core
voltages, and switch-mode power supply post-
regulators.
Dropout Voltage: 130 mV (typical) at 1.5-A load
current.
Low Ground Pin Current: 10 mA (typical) at 1.5-A
load current.
Soft Start: Programmable soft-start time.
PART
NUMBER
LP38852-ADJ
Device Information⁽¹⁾
PACKAGE
BODY SIZE (NOM)
DDPAK/TO-263 (7)
TO-220 (7)
SO PowerPAD (8)
10.10 mm × 8.89 mm
14.986 × 10.16 mm
4.89 mm × 3.90 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Circuit
V_IN
V_BIAS
V_EN
GND
C_IN
10 PF Ceramic
C_BIAS
1 PF
LP38852-ADJ
IN
OUT
BIAS
ADJ
EN
SS
C_SS
GND
V_OUT
C_FF
R1
C_OUT
10 PF
Ceramic
R2
GND
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.