BD9745EKN Datasheet, PDF (1/22 Pages) Rohm – Silicon Monolithic Integrated Circuit

STRUCTURE
PRODUCT SERIES
Silicon Monolithic Integrated Circuit
7-Channel Switching Regulator Controller for Digital Camera
TYPE
ＢＤ９７４５ＥＫＮ
PACKAGE
Fig. 1 (Plastic mold) HQFN-48U package
PIN ASSIGNMENT
Fig. 2
BLOCK DIAGRAM
Fig. 3
APPLICATION CIRCUIT Fig. 4
FEATURES
● 1.5V Minimum input operating.
● Controls up to 7 switching regulators. Step up converter (1channel), Step-down converter
(1channel), Configurable for Step-up or Step-down conversion (3channels),
Positive to negative converter (1channel), Step-up converter for LED (1channel).
● Synchronous rectifying action mode (4channel), Built-in FET Transistor.
● Step-up converter for CCD,Built-in FET Transistor.
● Internal compensation.
● Operating frequency 1.2MHz(CH1～4), 600kHz(CH5～7).
● Short Circuit Protection(SCP) for Over load condition.
● Built-in load switch with soft-start for Step-up converter(CH6,7).
● Back gate control synchronous rectified DC/DC for Step-up(CH1,2,4).
● Thermally enhanced QFN48 package. ( 7mmX 7mm，0.4mm pitch )
Absolute maximum ratings（Ta＝25℃）
Parameter
Symbol
Limits
Units
Power Supply Voltage
VBAT, VCC, PVCC
－0.3～7
V
Power Input Voltage
Output Current
PVCC5, HS6H, HS7H
VHx1～4
VLx1～4
VLx6
IomaxLx1
IomaxLx2～4
Power Dissipation
Pd
O p e r a t i n g Te m p e r a t u r e
St o r a g e Te m p e r a t u r e
J u n c t i o n Te m p e r a t u r e
Topr
Tstg
Tjmax
(*1) Without external heat sink, the power dissipation reduces by 5.2mW/℃ over25℃.
(*2) Reduced by 12mW/℃ over 25℃, when mounted on a PCB (70.0mm×70.0mm×1.6mm).
Recommended operating conditions
Parameter
Symbol
－0.3～7
－0.3～7
－0.3～7
－0.3～18
±1.8
±1.5
0.65(*1)
1.50(*2)
－25～+85
－55～+150
+150
Spec.
V
V
V
V
A
A
W
W
℃
℃
℃
Units
Power Supply Voltage
VBAT
1.5 ～ 5.5
V
VCC, PVCC
2.5 ～ 5.5
V
1/21
REV. D