G5723 [GMT]
Synchronous Buck Converter with Low-Noise LDO Regulator;
| 型号： | G5723 |
| 厂家： | 
GLOBAL MIXED-MODE TECHNOLOGY INC |
| 描述： | Synchronous Buck Converter with Low-Noise LDO Regulator |
| 文件： | 总1页 (文件大小：44K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Global Mixed-mode Technology Inc.
G5723
Synchronous Buck Converter with Low-Noise LDO
Regulator
Features
Applications
Digital Still and Video Cameras
MP3 Players
Buck Converter
High Efficiency: Up to 95%
Portable Instruments
Low Quiescent Current: Only 50µA During Op-
eration
Internal Soft Start Function
600mA Output Current
2.5V to 6V Input Voltage Range
1.2MHz Switching Frequency
No Schottky Diode Required
100% Duty Cycle in Dropout Operation
0.6V Reference Allows Low Output Voltages
<1µA Shutdown Current
General Description
The G5723 consists of a synchronous step-down
DC/DC converter and a low-noise LDO regulator. The
DC/DC converter is operated on current mode archi-
tecture. Switching frequency is set at 1.2MHz allowing
the use of small surface mount inductor and capacitor.
The internal synchronous switches increase efficiency
and eliminate the need for external Schottky diode. It
is ideal for system powered by a 1-cell Li-ion battery.
Current Mode Operation for Excellent Line and
Load Transient Response
LDO Regulator
Ultra Low Output Noise 30µV (rms)
Ultra Low 55µA No-Load Supply Current
Ultra Low Dropout 70mV @ 50mA Load
Guarantee 300mA Output Current
Fixed Mode: No External Resistor Network
Needed
Max. Supply Current in Shutdown Mode < 1µA
Stable with Low Cost Ceramic Capacitors
Over Temperature Protected
RoHS Compliant
Ordering Information
ORDER
NUMBER
TEMP.
RANGE
PACKAGE
(Green)
MARKING
VOLTAGE
G5723-18P71U
G5723-30P71U
G5723-33P71U
G5723G
G5723E
G5723F
1.8V
3.0V
3.3V
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
MSOP-10
MSOP-10
MSOP-10
Note: P7: MSOP-10
1: Bonding Code
U: Tape & Reel
Pin Configuration
Typical Application Circuit
G5723
2.2µH
VOUT1
1.2V
600mA
COUT1
10µF
VIN
3.3~4.2V
LX
IN1
G5723
C
FB* (option)
CIN1
2.2µF
BATTERY
1
2
3
4
10
9
LX
EN1
AGND
FB1
EN1
FB1
PGND
IN1
R1
18K
R2
18K
8
IN2
OUT2
AGND
7
CIN2
1µF
IN2
5
6
EN2
VOUT2
EN2
OUT2
MSOP-10
AGND PGND
COUT2
4.7µF
R1
R2
VOUT1 = 0.6V × (1+
)
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.4
Aug 30, 2010
1
相关型号：
©2020 ICPDF网 联系我们和版权申明