BD7168GU-E Datasheet, PDF (1/60 Pages) Rohm – USB Switching Charger IC Integrating a USB Adapter Automatic Detection Function

Datasheet
For DSC/TABLET/Mobile Phones
USB Switching Charger IC Integrating a
USB Adapter Automatic Detection Function
BD7168GU
● Overview
● High-efficient step-down switching charger IC
integrating a USB adapter automatic detection function,
a 28V OVP, and a 40-mΩ Pch-FET between SYSTEM
and Battery for single-cell Li-ion Batteries for mobile
appliances
● Features
・A 28V OVP and a controller of protection for minus voltage
are integrated.
・A USB adapter automatic detection function based on D+
and D- detection is integrated.
・Set values can be changed via I2C communication.
・A 1-MHz synchronous current-mode step-down DC/DC
converter, which permits small external parts to be attached,
is integrated.
・The USB input current limit can be set at 100 mA, 500 mA,
900 mA, or 1500 mA with I2C and an external terminal.
・A current detection register is integrated, and external FETs
and diodes are not required.
・The switch between SYSTEM and VBAT contains a 40-mΩ
Pch FET.
・A battery assist function is integrated, which automatically
supplied electric power from the battery in case of
insufficient USB input electric power.
・A ultra-miniature WL-CSP is adopted, which measures 3.2
x 3.2 mm and has a 0.5-mm pitch.
● Application
・Digital still cameras, tablet PC, mobile phones, smart cell
phones
● Application circuit
● Package
・VCSP85H3
3.20mm x 3.20mm x 1.0mm
● Operation conditions
・Input voltage range；
・Output voltage range；
・Output current；
・Switching frequency；
・High-side FET(Pch)ON resistance；
・Low-side FET(Nch)ON resistance；
3.895～6.0V
0～5.5V
2.0A(max)
1.0MHz(typ.)
125mΩ(typ.)
100mΩ(typ.)
● Terminal arrangement diagram (TOP VIEW)
A1
A2
A3
DMO
DPO
DMI
A4
A5
A6
DPI
VBUS
VBUS
B1
B2
B3
B4
B5
B6
GND
CEN
USB_OK GCNT
VIN
VIN
C1
C2
C3
C4
C5
C6
VREG
USUS
(index)
IUSSET1
LX
LX
D1
D2
D3
D4
D5
D6
SCL
SDA
(TEST) IUSSET2
PGND
PGND
E1
E2
E3
VDD
XPWR_ON INT_B
E4
E5
E6
FB
SYSTEM
VBAT
F1
F2
F3
F4
F5
F6
CTI
CRG XPWR_RST
TH
SYSTEM
VBAT
Thermistor
Startup
control IC
System
power supply
microcomputer
○Product structure：Silicon monolithic integrated circuit ○This product is not designed
About this document
The Japanese version of this document is the formal data sheet. If you find differences from the Japanese data sheet, please have priority over this data sheet.
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© 2012 ROHM Co., Ltd. All rights reserved.
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TSZ02201-0Q2Q0A400070-1-2
20012.10.09 Rev.001