MAX8752 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – TFT LCD Step-Up DC-DC Converter

19-3793; Rev 0; 8/05
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TFT LCD Step-Up DC-DC Converter
General Description
The MAX8752 is a high-performance, step-up DC-DC
converter that provides a regulated supply voltage for
active-matrix thin-film transistor (TFT) liquid-crystal dis-
plays (LCDs). The MAX8752 incorporates current-mode,
fixed-frequency, pulse-width modulation (PWM) circuitry
with a built-in n-channel power MOSFET to achieve high
efficiency and fast transient response. The input supply
voltage of the MAX8752 is from 1.8V to 5.5V.
The MAX8752 operates with a switching frequency of
1.2MHz, allowing the use of ultrasmall inductors and low-
ESR ceramic capacitors. The current-mode architecture
provides fast transient response to the pulsed loads typi-
cal of LCD source-driver applications. A compensation
pin (COMP) gives users flexibility in adjusting loop
dynamics. The 14V internal MOSFET can generate output
voltages up to 13V. The internal digital soft-start and cur-
rent limit effectively control inrush and fault currents.
The MAX8752 is available in a 3mm x 3mm 8-pin TDFN
package with a maximum height of 8mm.
Applications
Notebook Computer Displays
LCD Monitor Panels
Automotive Displays
Features
♦ 1.8V to 5.5V Input Supply Range
♦ Built-In 14V, 2.2A, 0.2Ω n-Channel MOSFET
♦ High Efficiency (> 85%)
♦ Fast Transient Response to Pulsed Load
♦ High-Accuracy Output Voltage (1.5%)
♦ Internal Digital Soft-Start
♦ Input Supply Undervoltage Lockout
♦ 1.2MHz Switching Frequency
♦ 0.1µA Shutdown Current
♦ Small 8-Pin TDFN Package
Ordering Information
PART
TEMP
RANGE
MAX8752ETA -40°C to +85°C
PIN-
PACKAGE
8 TDFN
3mm x 3mm
PKG
CODE
T833-2
Typical Operating Circuit
V_IN
+1.8V TO +5.5V
V_MAIN
LX
IN
FB
MAX8752
COMP
GND
LDO
SHDN ^SUP
IN
TOP VIEW
Pin Configuration
MAX8752
TDFN
3mm x 3mm
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