Rainbow Electronics MAX17062 - Manual

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
♦ 90% Efficiency
♦ Adjustable Output from V
IN to 20V
♦ 2.6V to 5.5V Input Supply Range
♦ Input Supply Undervoltage Lockout
♦ Pin-Programmable 640kHz/1.2MHz Switching
Frequency
♦ Programmable Soft-Start
♦ Improved EMI
♦ FB Regulation Voltage Tolerance < 1%
♦ Small 10-Pin TDFN Package
♦ Thermal-Overload Protection
MAX17062
TFT-LCD Step-Up DC-DC Converter
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-1042; Rev 0; 10/07
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.
EVALUATION KIT
AVAILABLE
PART TEMP RANGE
PIN-
PACKAGE PKG
CODE
MAX17062ETB+T -40
°C to +85°C
10 TDFN-EP*
(3mm x 3mm)
T1033-2
COMP
1 2 3 4 5
10 9 8 7 6
FB
PGND PGND SHDN
SS FREQ LX LX IN
MAX17062
TOP VIEW
TDFN
(3mm x 3mm)
*EP = EXPOSED PAD.
*EP
Pin Configuration
LX LX
FB
PGND
PGND
AGND
FREQ
IN
COMP SS
EP
1
4
5
2
3
9
8
6 7
10
V
OUT
V IN
2.6V TO 5.5V
SHDN
MAX17062
Minimal Operating Circuit
+ Denotes a lead-free package.
* EP = Exposed pad.
T = Tape and reel.