G5565

G5565
Global Mixed-mode Technology
Quad-Output TFT LCD Bias Power
General Description
Features
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The G5565 DC-DC converter provides regulated voltages required by thin-film transistor (TFT) liquid crystal
displays (LCD) panels in TQFN5X5-28 package. One
step-up converter, one step-down converter, and two
charge pumps regulators converter the 8V to 14V input
voltage into four output voltages. These features complete the power- supply requirements of large screen
LCD panels. The step-up converter provides source
voltages VAVDD and the step-down converter provides
logic voltage VLOGIC for the system. The dual charge
pumps regulators independently generate adjustable
regulated output voltages VGL and VGH to bias the
LCD using external charge pump attached to the
switching node. . The step-up converter operates with a
adjustable switching frequency from 500kHz to 2MHz.
And step-down converter operates with a fixed switching
frequency of 750kHz.
Input Supply Range: 9.5V ~ 14V
Current mode Boost converter for AVDD
¾ Adjustable switching frequency
¾ Integrated 20V/4A ,0.1Ω switching N-MOSFET
¾ 1.5% accurate with 3.5-A switching current
Buck Converter for VLOGIC
¾ Fixed 750kHz switching frequency
¾ Integrated 12-V/0.2-C Switching N-MOSFET
¾ 1.5% accurate with 1.5-A switching current
Charge-pump regulator for VGON & VGOFF
Built-in power-on sequence and soft-start
function
GD Signal to drive external P-MOSFET
Protection Function
¾ Input Under Voltage Lockout (UVLO)
¾ Thermal overload Protection (TOP)
¾ Over-Voltage Protection for (OVP)
¾ Over-Current Protection (OCP)
¾ Output Under Voltage Protection (UVP)
¾ Short Circuit Protection (SCP)
Available in TQFN-5X5-28 Package
Both step-up and step-down converters operate in
asynchronous switch mode. Current mode control provides fast transient response and eases loop stabilization. Fault protection includes cycle-by-cycle current
limit, thermal shutdown and short-circuit protection,
and over voltage protection of the step-up converter.
Applications
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The G5565 is available in a 28-pin TQFN (5mm x 5mm)
package.
TFT LCD Displays
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
(Green)
G5565R61U
5565
-40°C ~ +85°C
TQFN5X5-28
Note: R6: TQFN5X5-28
1: Bonding Code
U: Tape & Reel
PGND
ENA2
ENA1
DRVP
24
23
22
PGND
26
25
LX
LX
28
21
FBP
2
20
FSW
3
19
DLY1
OS
1
AGND
FB
27
Pin Configuration
Thermal
Pad
18
COMPB
17
FBB
11
12
13
14
DLY2
CBOOT
LXB
LXB
VIN
10
VIN
15
VDC
16
7
8
6
9
SS
REF
FBN
4
5
DRVN
GD
COMP
G5565 TQFN5X5-28
Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation.
Ver: 0.1
Aug 06, 2012
TEL: 886-3-5788833
http://www.gmt.com.tw
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