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2010.03 - Rev.A
© 2010 ROHM Co., Ltd. All rights reserved.
Power Supply IC Series for TFT-LCD Panels
5V Input Multi-channel
System Power Supply IC
BD9862MUV
●Description
The BD9862MUV is a 3ch system power supply for mobile TFT liquid crystal panels.Operable at VBAT=1.8V, CH2 & CH3
adopts the original PWM/PFM automatic switching control charge pump and realizes high efficiency in full-load range.
●Features
1) Input voltage range: 1.8V~4.5V (The input voltage can be 5.5V if a double charge pump is not used)
2) The step-up switching regulator has a built-in output FET (CH1)
3) There is a built-in PWM/PFM automatic switching charge pump circuit with a fixed PWM terminal (CH2,3)
4) Switching regulator oscillation frequency: MHz(typ.)
5) Charge pump oscillation frequency: 500kHz(typ.)
6) There is a built-in circuit to discontinue output (timer latch type) in the event of overload
7) Package VQFN024V4040
●Applications
Small & medium TFT liquid crystal displays etc.
●Absolute Maximum Ratings (Ta = 25°C)
Parameter Symbol Ratings Unit
Maximum adding power supply voltage VBAT -0.3 ~ 7 V
Maximum adding voltage
LX -0.3 ~ 18
V
FB1, INV1, INV2, UVLOSET, C2N,
VIN2A, CN, CP, CPOUT, REGOUT,
PWM, RT ,VREF ,NON3
-0.3~7
VIN3, C3P, Vo2, C2P, VIN2B -0.3~15.5
Power dissipation Pd
0.34(*1)
W
0.70(*2)
Operating temperature range Topr -40 ~ +85 ℃
Storage Temperature Range Tstg -55 ~ +150 ℃
Junction temperature Tjmax +150 ℃
(*1) When used as a stand-alone IC (for Ta=25℃ and over), the value is reduced by 27mW/℃.
(*2) When used for Printed Circuit Boards (glass epoxy board of 74.2mm×74.2mm×1.6mm) mounting
for Ta=25℃ and over, the value is reduced by 5.6mW/℃.
●Operating Conditions(Ta=25℃)
Parameter Symbol
Ratings
Unit condition
MIN TYP MAX
Power Supply Voltage VBAT 1.8 - 4.5
(
※
1)
V
CH1Output Voltage Vo1 - - 15 V
CH2 Output Voltage Vo2 - - 15 V
CH3 Output Voltage Vo3 -15 - - V
Starting capacit
, adding charge pump
flying capacitor
Cflys,Cflya 0.1 0.22 - µF
Reversing capacity charge pump
flying capacitor
Cflyi 0.022 0.047 - µF
Starting charge pump Output capacitance CCPOUT 1.0 2.0 - µF CCPOUT≧Cfly*10
Switching regulator oscillation frequency fOSC1 700 1.0 1.4 MHz RRT=82kΩ~180kΩ
Charge pump oscillation frequency fOSC2 350 500 700 kHz RRT=82kΩ~180kΩ
CH1 PowerNMOS Drain current Iidn1 - - 1.0 A
(※1) When using a double charge pump for starting. 5.5V when not using a double charge pump
No.10035EAT16
