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PDF RT9913A Data sheet ( Hoja de datos )
| Número de pieza | RT9913A | |
| Descripción | Integrated Multi-Channel DC-DC Converter | |
| Fabricantes | Richtek | |
| Logotipo |  |
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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
1 page  
Preliminary
RT9913A/B
Absolute Maximum Ratings (Note 1)
z Supply Input Voltage, VIN ----------------------------------------------------------------------------------- −0.3V to 7V
z VGH-AVDD, VGHM-AVDD ---------------------------------------------------------------------------------- 18V
z LX ---------------------------------------------------------------------------------------------------------------- −0.3V to 16V
z VGH, VGHM RE ---------------------------------------------------------------------------------------------- −0.3V to 30V
z AVDD ------------------------------------------------------------------------------------------------------------ −0.3V to 16V
z OPAI, OPAO --------------------------------------------------------------------------------------------------- −0.3V to (AVDD + 0.3V)
z DRVN ------------------------------------------------------------------------------------------------------------ (VIN − 16V) to (VIN + 0.3V)
z VFLK, VREF, FBN, CD, RESET_, VDIV, SS, COMP, EN, FB ------------------------------------ −0.3V to (VIN + 0.3V)
z LDOI ------------------------------------------------------------------------------------------------------------- −0.3V to 7V
z ADJ, LDOO ---------------------------------------------------------------------------------------------------- −0.3V to (LDOI + 0.3V)
z Power Dissipation, PD @ TA = 25°C
VQFN-24L 4x4 ------------------------------------------------------------------------------------------------ 1.786W
z Package Thermal Resistance (Note 4)
VQFN-24L 4x4, θJA ------------------------------------------------------------------------------------------- 56°C/W
z Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------ 260°C
z Storage Temperature Range ------------------------------------------------------------------------------- −65°C to 150°C
z Junction Temperature ---------------------------------------------------------------------------------------- 150°C
z ESD Susceptibility (Note 2)
HBM (Human Body Mode) --------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ----------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 3)
z Ambient Temperature Range ------------------------------------------------------------------------------- −40°C to 85°C
z Junction Temperature Range ------------------------------------------------------------------------------- −40°C to 125°C
Electrical Characteristics
(VIN = 3.3V, VOUT = 8.5V, TA = 25°C, unless otherwise specification)
Parameter
Symbol
Test Condition
System Supply
Input Supply Voltage
VIN
VIN Under Voltage Lockout Threshold VUVLO
VIN rising
Hysteresis
VIN Quiescent Current
IQ
Shut Down Current
IIN
EN Threshold
Logic-High Voltage VIH
Logic-Low Voltage VIL
VFB = 1.3V, LX no switching
VFB = 1.1V, LX switching
VIN = 3.3V
Main Boost Regulator
Operation Frequency
FOSC
RT9913 A
RT9913 B
Maximum Duty Cycle
DS9913A/B-00 February 2006
Min Typ Max Units
2.5
1.8
0.05
0.15
1
--
--
0.8
--
2.0
0.1
0.4
2
1
--
--
5.5
2.2
0.15
1
3.5
5
1.5
--
V
V
mA
mA
μA
V
-- 640 -- kHz
0.9 1.2
1.4 MHz
86 90 94 %
To be continued
www.richtek.com
5
5 Page 
Preliminary
RT9913A/B
VFLK
(1V/Div)
VGHM
(10V/Div)
VGHM
VLDOO
ac coupled
(50mV/Div)
ILDOO
(200mA/Div)
R11 = 1.2kΩ, C15 = 2.2nF
Time (10μs/Div)
LDO Load Transient
ILDOO = 10mA to 350mA
Time (100μs/Div)
VLDOO
ac coupled
(100mV/Div)
LDO Line Transient
2.59
2.585
LDO Load Regulation
VLDOI 4
(1V/Div) 3
VLDOO = 2.5V, VLDOI = 3V to 4V, ILDOO = 50mA
Time (100μs/Div)
2.58
2.575
2.57
0
500
450
400
350
300
250
200
150
100
50
0
0
LDO Dropout Voltage
85°C
25°C
-40°C
ILDO
(200mA/Div)
0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4
Load Current (A)
VLDO
(1V/Div)
VLDOO = 2.5V, VLDOI = 3.3V
50 100 150 200 250 300
LDO Loading Current (mA)
350
LDO OCP
IOUT = 100mA to 600mA
Time (100μs/Div)
DS9913A/B-00 February 2006
www.richtek.com
11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet RT9913A.PDF ] | |
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