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  Richtek Technology Electronic Components Datasheet  

RT9913A Datasheet

Integrated Multi-Channel DC-DC Converter

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RT9913A pdf
Preliminary
RT9913A/B
Integrated Multi-Channel DC-DC Converter for
TFT LCD Panels
General Description
Features
The RT9913A/B includes a high-performance boost
regulator, one linear-regulator controller for VGL, one low
dropout linear regulator, a gate pulse modulator (GPM), a
voltage detector and a VCOM Buffer (Unity- gain OPA) for
active-matrix thin-film transistor (TFT) liquid-crystal displays
(LCDs).
The boost converter provides the regulated supply voltage
for the panel source driver ICs. With integrated 16V
N-Channel 0.2Ω MOSFET it allows the use of ultra-small
inductors and ceramic capacitors and provides fast transient
response to pulsed loads. The VGL linear-regulator
controller provides regulated TFTGate-Off . The low-dropout
linear regulator (LDO) using an internal PMOS as the pass
device can supply up to 350mA current is suitable for the
supply voltage to the T-CON ASIC. And the GPM is
controlled by frame signals from timing controller to
modulate the Gate-On voltage. Voltage detector monitors
the supply voltage to issue a reset signal while the
detected voltage is too low. The VCOM Buffer (Unity-gain)
high-performance operation amplifier) can drive the LCD
backplane (VCOM) and features high short-circuit current
(140mA), fast slew rate (12V/μs), wide bandwidth (12MHz)
and rail-to-rail input and output.
z 2.5V to 5.5V Input Supply Voltage
z 640kHz/1.2MHz (A/B version) Current-Mode Step-Up
Boost Regulator
Fast Transient Response to Pulsed Load
High Accuracy Output Voltage (±2%)
Built-In 16V, 2.0A, 0.2Ω N-Channel MOSFET
High Efficiency Up to 90%
Programmable Soft-Start
Programmable Over-Current Protection
z Linear-Regulator Controller for VGL
z Low Drop-Out Voltage Linear Regulator
Adjustable Output Voltage (2.5V to 3.3V)
350mA Maximum Output Current
z On-Chip GPM Controller with Adjustable Falling
Time
Flicker Compensator
Power-On Sequence Control
z Low Voltage Detector
Programmable Detecting Voltage and Delay Time
z Unity-Gain Operation Amplifier for VCOM Buffer
z Over-Temperature Protection
z Thin 24-Lead VQFN Package
z RoHS Compliant and 100% Lead (Pb)-Free
Ordering Information
RT9913A/B
Package Type
QV : VQFN-24L 4x4 (V-Type)
Marking Information
For marking information, contact our sales representative
directly or through a RichTek distributor located in your
area, otherwise visit our website for detail.
Operating Temperature Range
P : Pb Free with Commercial Standard
Switching Frequency
A : 640kHz
B : 1.2MHz
Note :
RichTek Pb-free products are :
`RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
`Suitable for use in SnPb or Pb-free soldering processes.
`100% matte tin (Sn) plating.
DS9913A/B-00 February 2006
www.richtek.com
1


  Richtek Technology Electronic Components Datasheet  

RT9913A Datasheet

Integrated Multi-Channel DC-DC Converter

No Preview Available !

RT9913A pdf
RT9913A/B
Pin Configurations
Preliminary
(TOP VIEW)
24 23 22 21 20 19
VFLK 1
18 LX
VGH 2
17 VIN
VGHM 3
RE 4
GND
16 COMP
15 SS
VREF 5
14 LDOI
FBN 6
13 LDOO
7 8 9 10 11 12
Typical Application Circuit
VQFN-24L 4x4
Q1
D4
BAT54S
VGL MMBT3904
-6V
C13
0.22uF
C12
0.1uF
C11
0.1uF
VIN
3.3V
L1
4.7uH
C5
0.1uF
0C.61uF
D3 BAT54S
R9
240k
R8
6.8k
Chip Enable
1C0u1F
RSET 19 EN
17
VIN
LX 18
D2
BAT54S
D1 SS12
0C.71uF
VAVDD
8.5V
C8
0.1uF
3R0GkH
R1
R10
50k
C4
27nF
7 DRVN
6 FBN
15 SS
FB 20
COMP 16
R3
56k
CCOMP C3
330k
R2
56k
C2
4.7uF x 3
5
RT9913
VREF
NC 1nF
VGH 2
C14
0.22uF
VFLK
VDIN
VLDO
RESET
R6 VAVDD
65k
C10
0.1uF
8 CD
R14
100k
1 VFLK
9 RESET
22 AVDD
10 VDIV
VGHM 3
RE 4
R11
1.2k
OPAO 23
OPAI 24
LDOI 14
LDOO 13
ADJ 12
R4
56k
VGHM
C15 25V
1.5nF
VAVDD
VCOM_OUT
VCOM_IN
R12
56k
VIN
C16 3.3V
1uF
R13
56k
VLDO
2.5V
R7
110k
AGND PGND
R5
56k
C9
1uF
11 21
www.richtek.com
2
DS9913A/B-00 February 2006


Part Number RT9913A
Description Integrated Multi-Channel DC-DC Converter
Maker Richtek
Total Page 18 Pages
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RT9913A pdf
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1 RT9913A Integrated Multi-Channel DC-DC Converter Richtek
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RT9913A pdf
2 RT9913B Integrated Multi-Channel DC-DC Converter Richtek
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