BD83854MUV Datasheet, PDF (1/23 Pages) Rohm – High frequency operation

Datasheet
Single-chip Type with Built-in FET Switching Regulator Series
Step-up and inverted Output
Power Supply for TFT-LCD Displays
BD83854MUV
General Description
BD83854MUV is a step-up switching regulator and
charge pump inverter for small TFT-LCD Displays. It has
a wide input voltage range of 2.5V to 4.5V that is
suitable for portable applications. In addition, its small
package design is ideal for miniaturizing the power
supply.
Features
 Wide input voltage range of 2.5V to 4.5V
 High frequency operation
 Output Discharge Independent ON/OFF
signal(STBYP, STBYN)
 Circuit protection
 Over Current Protection (OCP)
 Short Current Protection (SCP)
 Under Voltage Lock Out (UVLO)
 Thermal Shutdown (TSD)
Key Specifications
■ Input Voltage Range
■ Output Boost Voltage
■ Output Inverted Voltage
■ Maximum Current
■ Operating Frequency
■ Efficiency
■ Output Voltage Accuracy
■ Standby Current
2.5V to 4.5V
5.4V(typ)
-5.4V(typ)
50mA(max)
1.0MHz(typ)
>85 %(typ)
±2 %(typ)
1µA(max)
Package
W(Typ) x D(Typ) x H(Max)
Applications
 TFT LCD Smart phones
 TFT LCD Tablets
Typical Application Circuit
LLX
4.7µH
UCSP50L1C
1.80mm^Vx^Q1^F.5^N0²m⁰m^PVx³0⁵.³5⁵7mm
3.50mm x 3.50mm x 1.00mm
VIN
2.5V to 4.5V
C1
4.7µF
VIN
PGND1
PGND2
AGND
LX
VREG_OUT
VREG_IN
VREG_CP
VOUTP
STBYP
STBYN
CP1
CP2
VOUTN
CVREG
4.7µF
CCP
2.2µF
CVOP
4.7µF
V+
5.4V/max50mA
CVON
4.7µF
V-
-5.4V/max50mA
Figure 1. Application Circuit
〇Product structure : Silicon monolithic integrated circuit
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© 2014 ROHM Co., Ltd. All rights reserved.
TSZ22111 • 15 • 001
〇This product has no designed protection against radioactive rays
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TSZ02201-0242AAJ00040-1-2
29.Aug.2014 Rev. 001