TECHNICAL NOTE
Single-chip built-in FET type Switching Regulator Series
Output 0.5A or Less
1ch High Efficiency Step-down Switching
Regulator with Built-in Power MOSFET
BD9180GUL
●Description
The BD9180GUL is a step-down Switching regulator designed to produce a low voltage from 1-cell Li-Ion batteries. The
BD9180GUL is suitable for low power application,and an internally set 2MHz switching frequency allows the use of small
inductors and capacitors to achieve a small application.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 (Simple Light Load Mode)
3) Input voltage range : 2.3V to 5.5V
4) Output current max. : 300mA
5) 2MHz Fixed frequency Operation
6) Incorporates soft-start function
7) Incorporates thermal protection, ULVO and short-current protection circuit with time delay function.
8) Incorporates shutdown function.
9) Employs WL-CSP : small 1.1mm×1.6mm
●Use
・
Mobile Phone, Smart-phone, PDAS
・
Digital Still Cameras
・
Portable Media Players
・
Wireless-LAN
●ABSOLUTE
MAXIMUM RATING(Ta=25℃)
Parameter
Supply Voltage
EN Voltage
SW Voltage
SW Output Current
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Maximum Junction Temperature
1
Symbol
V
CC
V
EN
V
SW
I
SW
Pd
Topr
Tstg
Tjmax
Limit
-0.3½+7 *
-0.3½+7
-0.3½+7
450 *
510 *
1
2
1
Unit
V
V
V
mA
mW
℃
℃
℃
-30½+85
-55½+150
+150
* Pd, ASO, and Tjmax=150℃ should not be exceeded.
2
* Derating is 4.08 mW /℃ for temperatures above Ta=25℃
(when mounted on 50mm×58mm×1.75mm glass epoxy PCB which has 8 layers).
●OPERATING
CONDITIONS(Ta=-30½+85℃)
Parameter
Supply Voltage
EN Voltage
SW Average Output Current
3
Symbol
V
CC
V
EN
I
SW
Min.
2.3
0
-
Typ.
3.3
-
-
Max.
5.5
5.5
300*
3,4
Unit
V
V
mA
* In case set output current 300mA, VccMin.=2.7V.
4
* Pd and ASO should not be exceeded.
This product is not designed for protection against radioactive rays.
Status of this document
The Japanese version of this document is the formal specification. This translated version is exclusively intended as a reference, and may only
be used as an auxiliary aid in reading the formal version. If there are any differences between the Japanese and translated versions of this
document, the formal version takes priority.
Sep. 2008
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