G5719 [GMT]
1MHz, 2A Synchronous Step-Down Regulator;
| 型号： | G5719 |
| 厂家： | 
GLOBAL MIXED-MODE TECHNOLOGY INC |
| 描述： | 1MHz, 2A Synchronous Step-Down Regulator |
| 文件： | 总2页 (文件大小：86K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Global Mixed-mode Technology
G5719
1MHz, 2A Synchronous Step-Down Regulator
General Description
Features
The G5719 is a high efficiency monolithic synchronous
buck regulator using a constant frequency, current
mode architecture. Supply current during operation is
only 50µA and drops to <1µA in shutdown. The 2.5V
to 6V input voltage range makes the G5719 ideally
suited for single Li-Ion battery-powered applications.
100% duty cycle provides low dropout operation, ex-
tending battery run time in portable systems. Switching
frequency is internally set at 1MHz, allowing the use of
small surface mount inductors and capacitors. The
internal synchronous switch increase efficiency and
eliminates the need for an external Schottky diode.
Built-in soft start function eliminates in-rush current
that could damage the system.
High Efficiency: Up to 95%
Low Quiescent Current: Only 50µA During Op-
eration
Internal Soft Start Function
2A Output Current
2.5V to 6V Input Voltage Range
1MHz Switching Frequency
No Schottky Diode Required
100% Duty Cycle in Dropout Operation
0.6V Reference Allows Low Output Voltages
<1µA Shutdown Current
Current Mode Operation for Excellent Line and
Load Transient Response
Over Temperature Protected
RoHS Compliant
Applications
Cellular Telephones
Personal Information Appliances
Microprocessors and DSP Core Supplies
Wireless and DSL Modems
Digital Still and Video Cameras
MP3 Players
Portable Instruments
Ordering Information
ORDER
NUMBER
TEMP.
RANGE
PACKAGE
(Green)
OUTPUT
VOLTAGE
MARKING
G5719TB1U
5719x
Adjustable
-40°C to +85°C
SOT-23-6
Note: TB: SOT-23-6
1: Bonding Code
U: Tape & Reel
Pin Configuration
Typical Application Circuit
G5719
G5719
2.2µH
4
1
3
6
VIN
4~6V
VOUT
3.3V
2A
LX
VIN
1
2
3
6
5
4
EN
GND
LX
VFB
NC
C
FB* (option)
CIN
2.2µF
CER
COUT
10µF
CER
EN
VFB
VIN
R1
82k
GND
R2
18k
SOT-23-6
R1
R2
VOUT = 0.6V • (1+
)
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.4
Oct 19, 2012
1
G5719A
Global Mixed-mode Technology
1MHz, 2A Synchronous Step-Down Regulator
General Description
Features
The G5719A is a high efficiency monolithic synchro-
nous buck regulator using a constant frequency, cur-
rent mode architecture. Supply current during opera-
tion is only 50µA and drops to <1µA in shutdown. The
2.5V to 6V input voltage range makes the G5719A
ideally suited for single Li-Ion battery-powered applica-
tions. 100% duty cycle provides low dropout operation,
extending battery run time in portable systems.
Switching frequency is internally set at 1MHz, allowing
the use of small surface mount inductors and capaci-
tors. The internal synchronous switch increase effi-
ciency and eliminates the need for an external Schot-
tky diode. Built-in soft start function eliminates in-rush
current that could damage the system.
High Efficiency: Up to 95%
Low Quiescent Current: Only 50µA During Op-
eration
Internal Soft Start Function
2A Output Current
2.5V to 6V Input Voltage Range
1MHz Switching Frequency
No Schottky Diode Required
100% Duty Cycle in Dropout Operation
0.6V Reference Allows Low Output Voltages
<1µA Shutdown Current
Current Mode Operation for Excellent Line and
Load Transient Response
Over Temperature Protected
RoHS Compliant
Power Good
Applications
Cellular Telephones
Personal Information Appliances
Microprocessors and DSP Core Supplies
Wireless and DSL Modems
Digital Still and Video Cameras
MP3 Players
Portable Instruments
Ordering Information
ORDER
NUMBER
TEMP.
RANGE
PACKAGE
(Green)
OUTPUT
VOLTAGE
MARKING
G5719ATB1U
519Ax
Adjustable
-40°C to +85°C
SOT-23-6
Note: TB: SOT-23-6
1: Bonding Code
U: Tape & Reel
Pin Configuration
Typical Application Circuit
R
10k
G5719A
G5719A
5
3
4
VIN
VIN
PG
VIN
4~6V
2.2µH
1
2
3
6
5
4
EN
GND
LX
VFB
PG
VOUT
3.3V
2A
LX
C
FB* (option)
CIN
2.2µF
CER
COUT
10µF
CER
1
EN
6
VFB
VIN
GND
R1
82k
R2
18k
SOT-23-6
R1
R2
VOUT = 0.6V • (1+
)
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.4
Oct 22, 2012
1
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