R1293K Series

R1293K Series
Multi power supply IC with Amplifier for LCD
The R1293K Series are multi power supply ICs dedicated for mid-size TFT LCD panels. Each of the IC consists of a PWM control
step-up DC/DC converter, an LDO regulator, a VCOM amplifier and six GAMMA amplifiers. The output noise can be reduced by SEL
pin. (SEL pin "H": normal mode, SEL pin "L": low noise mode.) The MOSFET for step-up DC/DC converter is built-in and, low power
operation is realized by standby mode. The package is 4mm square DFN(PLP)0404-32.
FEATURES
• Supply Current (IIN) ···················· Typ. 300μA (No switching)
• Standby Current (ISTB) ················· Typ. 60μA (In standby)
(Buffer Amplifier Part)
• Input Voltage Range for Amplifiers (VBUFF) ·····5.0V to 16.0V
(Absolute maximum
(DC/DC Part)
rating : 24V)
• Input Voltage Range (VIN) ············ 2.2V to 5.5V (Absolute maximum rating : 6.5V)
• Feedback Voltage (VFB)··············· 1.0V (The output voltage is adjustable up
• Input Voltage Range for VCOM Amplifier ·······1.5V to VBUFF-1.5V
to 16.0V with external resistors.)
• Output Current Range for VCOM Amplifier·····-100mA to 100mA
• Feedback Voltage Accuracy ········· ± 15mV
• Input Voltage Range for GAMMA Amplifier ·····0V to VBUFF
• Oscillator Frequency (fosc) ············ 300kHz to 1MHz with an external resistor
• Output Current Range for GAMMA Amplifier ···-10mA to 10mA
• Oscillator Maximum Duty Cycle (Maxduty) ·· Set with an external resistor. (Limit typ.90%)
• OVP Voltage (VOVP1) ······················· Typ. 21.0V
• Thermal Shutdown Circuit······················Stops at 150°C
• UVLO Detect Voltage (VUVLO1)··················· Typ. 1.9V
• Package·············································QFN(PLP)0404-32
• Soft Start Time (tstart) ··················· Typ. 10ms
• Coil-current Limit Circuit ·············· Current Limit Typ. 3A
• Latch Protection Circuit ··············· Delay time for protection adjustable with
an external capacitor.
SELECTION GUIDE
(LDO Part)
• Input Voltage Range (VIN_LDO) ······· 2.2V to 5.5V (Absolute maximum rating : 6.5V)
• Peak Current Limit Circuit ·········· Min. 350mA
Halogen Free
Package
Quantity per Reel
Part No.
• Output Voltage Range (VOUT) ······· 1.8V to 2.5V (Internally fixed)
• Output Voltage Accuracy ············· ± 1%
QFN(PLP)0404-32
2,000 pcs
R1293Kxx1A-E2
• Output Current ·························· 300mA
• Dropout Voltage (VDIF) ················ Typ. 0.4V (VSET≥2.4V, IOUT=250mA)
.xx. : Specify the LDO output voltage within the range of 1.8V (.18.)
• Ripple Rejection (RR) ················· Typ. 65dB (f=1kHz)
to 2.5V (.25.) in 0.1V steps.
• Fold-back Protection Circuit ········· Current limit Typ. 70mA
BLOCK DIAGRAM
PACKAGE
QFN(PLP)0404-32
R1293K
Top View
Bottom View
24 23 22 21 20 19 18 17
VIN
VIN_DC
Lx
25
26
27
28
29
30
31
32
DC/DC OUT
Lx
RT
Step-up
DC/DC
DTC
VFB
1 2 3 4 5 6 7 8
DELAY
VIN
VIN_LDO
IN-GM1
IN-GM2
IN-GM3
IN-GM4
IN-GM5
IN-GM6
DC/DC OUT
AMPOUT
LDO
LDO OUT
GANMA AMP 1
VO-GM1
GANMA AMP 2
VO-GM2
GANMA AMP 3
VO-GM3
GANMA AMP 4
GANMA AMP 5
GANMA AMP 6
VO-GM4
VO-GM5
VO-GM6
VBOFF
VCOM AMP
IN-COM
ENB
UVLO
VSEL
GND
VO-COM
Thermal Shutdown
PGND
PGND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
PGND
PGND
VO_LDO
VIN_LDO
IN_GM1
IN_GM2
IN_GM3
IN_GM4
IN_GM5
IN_GM6
VO_GM1
VO_GM2
VO_GM3
VO_GM4
VO_GM5
VO_GM6
GND
VBUFF
IN_COM
VO_COM
GND
RT
DTC
SEL
DELAY
ENB
VFB
AMPOUT
GND
VIN_DC
Lx
Lx
17 18 19 20 21 22 23 24
16
15
14
13
12
11
10
9
16
15
14
13
12
11
10
9
∗
25
26
27
28
29
30
31
32
8 7 6 5 4 3 2 1
Power GND pin
Power GND pin
LDO output pin
LDO power input pin
GAMMA1 input pin
GAMMA2 input pin
GAMMA3 input pin
GAMMA4 input pin
GAMMA5 input pin
GAMMA6 input pin
GAMMA1 output pin
GAMMA2 output pin
GAMMA3 output pin
GAMMA4 output pin
GAMMA5 output pin
GAMMA6 output pin
GND pin
Buffer Amplifier power source pin
VCOM input pin
VCOM output pin
GND pin
Oscillator frequency setting pin
Maxduty / soft start time setting pin
Noise reduction level selection pin
Short protection delay setting pin
Chip enabled pin (DC/DC or Buffer Amplifier)
DC/DC feedback pin
DC/DC phase compensation pin
GND pin
DC/DC power source pin
DC/DC switching pin
DC/DC switching pin
∗) The tab is substrate level (GND).
APPLICATION
• Power source for mid-size TFT LCD panels
No.EK-301-140930
Multi power supply IC
1. The products and the product specifications described in this document are subject to change or
discontinuation of production without notice for reasons such as improvement. Therefore, before
deciding to use the products, please refer to Ricoh sales representatives for the latest information
thereon.
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4. The technical information described in this document shows typical characteristics of and example
application circuits for the products. The release of such information is not to be construed as a
warranty of or a grant of license under Ricoh's or any third party's intellectual property rights or any
other rights.
5. The products listed in this document are intended and designed for use as general electronic
components in standard applications (office equipment, telecommunication equipment, measuring
instruments, consumer electronic products, amusement equipment etc.). Those customers intending to
use a product in an application requiring extreme quality and reliability, for example, in a highly specific
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semiconductor products are likely to fail with certain probability. In order to prevent any injury to
persons or damages to property resulting from such failure, customers should be careful enough to
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the products or the technical information.
Halogen Free
Ricoh is committed to reducing the environmental loading materials in electrical devices
with a view to contributing to the protection of human health and the environment.
Ricoh has been providing RoHS compliant products since April 1, 2006 and Halogen-free products since
April 1, 2012.
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