REV. D
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ADP3041
TFT LCD Panel Power Module
FEATURES
600 kHz PWM Frequency
Fully Integrated 1.5 A Power Switch
3% Output Regulation Accuracy
Simple Compensation
Small Inductor and MLC Capacitors
300 H9262A Quiescent Supply Current
90% Efficiency
Undervoltage Lockout
5 Buffers
TSSOP 20-Lead Package
Pb-Free Part
APPLICATIONS
TFT LCD Bias Supplies
FUNCTIONAL BLOCK DIAGRAM
RAMP
GEN
Q
S
R
F/F
NC
DRIVER
CURRENT
SENSE
AMPLIFIER
COMP
SW
FB
IN
COMPARATOR
ERROR
AMP
PGND
BIAS
g
m
SD
OSC
ADP3041
SS
VCMO
G1O
AGND
G2O
G3O
G4O
G1I
G2I
G3I
G4I
VCMI
AVCC
SOFT START
REF
GENERAL DESCRIPTION
The ADP3041 is a fixed frequency, PWM step-up dc-to-dc
switching regulator with five buffers capable of 12 V boosted
output voltage in a TSSOP 20-lead package. It provides high
efficiency, low noise operation, and excellent dynamic response,
and is easy to use. The high switching frequency allows for small,
cost-saving, external inductive and capacitive components. The
ADP3041 operates in PWM current mode. The current limit
and the power switch are integrated completely on-chip.
Capable of operating from 2.5 V to 5.5 V input, the ADP3041
is ideal for thin-film transistor (TFT) liquid crystal display
(LCD) module applications, where local point-of-use power
regulation is required. Supporting output voltages down to 4.5 V,
the ADP3041 is ideal to generate today’s low voltage rails, pro-
viding the optimal solution in its class for delivering power
efficiently, responsively, and simply with minimal printed circuit
board area.
The ADP3041 integrates five buffers. Each buffer can deliver
35 mA output current and has rail-to-rail input and output
capability.