BD9122GUL_09 Datasheet, PDF (1/14 Pages) Rohm – Output 0.5A or Less High Efficiency Step-down Switching Regulator with Built-in Power MOSFET

Single-chip Type with built-in FET Switching Regulator Series
Output 0.5A or Less High Efficiency
Step-down Switching Regulator
with Built-in Power MOSFET
BD9122GUL
No.09027EAT31
●Description
ROHM’s high efficiency step-down switching regulator (BD9122GUL) is a power supply designed to produce a low voltage
including 1 volts from 5/3.3 volts power supply line. Offers high efficiency with our original pulse skip control technology and
synchronous rectifier. Employs a current mode control system to provide faster transient response to sudden change in load.
●Features
1) Offers fast transient response with current mode PWM control system.
2) Offers highly efficiency for all load range with synchronous rectifier (Nch/Pch FET) and SLLM^TM (Simple Light Load Mode)
3) Incorporates soft-start function.
4) Incorporates thermal protection and ULVO functions.
5) Incorporates short-current protection circuit with time delay function.
6) Incorporates shutdown function
7) Employs WL-CSP : VCSP50L2
●Use
Power supply for LSI including DSP, Micro computer and ASIC
●Absolute Maximum Ratings (Ta=25℃)
Parameter
Symbol
Limits
Unit
VCC Voltage
PVCC Voltage
VCC
PVCC
-0.3～+7 ^＊1
V
-0.3～+7 ^＊1
V
EN Voltage
VEN
-0.3～+7
V
SW,ITH Voltage
Power Dissipation
VSW,VITH
-0.3～+7
V
Pd
660^＊2
mW
Operating temperature range
Topr
-25～+85
℃
Storage temperature range
Tstg
-55～+150
℃
Maximum junction temperature
Tjmax
+150
℃
＊1 Pd should not be exceeded.
＊2 Derating in done 5.28mW/℃ for temperatures above Ta=25℃, Mounted on 50mm×58mm×1.6mm Glass Epoxy PCB.
●Operating Conditions (Ta=25℃)
Parameter
Symbol
VCC Voltage
PVCC Voltage
VCC ^*3
PVCC ^*3
EN Voltage
SW average output
EN
Isw ^*3
Output voltage Setting Range
VOUT
＊3 Pd should not be exceeded.
＊4 In case set output voltage 1.8V or more, VccMin = 2.7V.
Min.
Limits
Typ.
Max.
Unit
2.5^*4
3.3
5.5
V
2.5^*4
3.3
5.5
V
0
-
VCC
V
-
-
0.3
A
1.0
-
2.0
V
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2009.05 - Rev.A