MAX17062 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – TFT-LCD Step-Up DC-DC Converter

19-1042; Rev 0; 10/07
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TFT-LCD Step-Up DC-DC Converter
General Description
The MAX17062 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 MAX17062 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.
Users can select 640kHz or 1.2MHz operation using a
logic input pin (FREQ). The high switching frequencies
allow the use of ultra-small inductors and low-ESR
ceramic capacitors. The current-mode architecture pro-
vides fast transient response to pulsed loads. A com-
pensation pin (COMP) gives users flexibility in adjusting
loop dynamics. The 22V internal MOSFET can generate
output voltages up to 20V from an input voltage
between 2.6V and 5.5V. Soft-start slowly ramps the input
current and is programmed with an external capacitor.
The MAX17062 is available in a 10-pin TDFN package.
Applications
Notebook Computer Displays
LCD Monitor Panels
LCD TV Panels
Features
o 90% Efficiency
o Adjustable Output from V_IN to 20V
o 2.6V to 5.5V Input Supply Range
o Input Supply Undervoltage Lockout
o Pin-Programmable 640kHz/1.2MHz Switching
Frequency
o Programmable Soft-Start
o Improved EMI
o FB Regulation Voltage Tolerance < 1%
o Small 10-Pin TDFN Package
o Thermal-Overload Protection
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX17062ETB+T
-40°C to +85°C
10 TDFN-EP*
(3mm x 3mm)
T1033-2
+Denotes a lead-free package.
*EP = Exposed pad.
T = Tape and reel.
Pin Configuration
Minimal Operating Circuit
TOP VIEW
10 9 8 7 6
MAX17062
*EP
12 345
*EP = EXPOSED PAD.
TDFN
(3mm x 3mm)
V_IN
2.6V TO 5.5V
V_OUT
6
LX
8
IN
7
LX
FB ²
MAX17062
9
FREQ
PGND ⁵
3 _SHDN
PGND ⁴
10
SS
AGND
EP
COMP ¹
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.