G5719BT11U [GMT]
Switching Regulator, Current-mode, 1000kHz Switching Freq-Max, PDSO5, SOT-23, 5 PIN;
| 型号： | G5719BT11U |
| 厂家： | 
GLOBAL MIXED-MODE TECHNOLOGY INC |
| 描述： | Switching Regulator, Current-mode, 1000kHz Switching Freq-Max, PDSO5, SOT-23, 5 PIN 开关 光电二极管 |
| 文件： | 总1页 (文件大小：67K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
G5719B
Global Mixed-mode Technology
1MHz, 3A Synchronous Step-Down Regulator
General Description
Features
High Efficiency: Up to 95%
The G5719B 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 G5719B ideally suited for single
Li-Ion battery-powered applications. 100% duty cycle pro-
vides 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 capacitors. The internal synchronous switch increase
efficiency and eliminates the need for an external Schot-
tky diode. Built-in soft start function eliminates in-rush
current that could damage the system. Output latch-off
operation protects the step-down regulator from damage
under short circuit and overvoltage conditions.
Low Quiescent Current: Only 50µA During Opera-
tion
Internal Soft Start Function
Output Current
G5719BTB1U: 2A Continuous, 3A Peak
G5719BRC1U: 3A Continuous
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
Output Short Circuit Latch-off Protection
Output Overvoltage Latch-off Protection
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
TEMP.
RANGE
PACKAGE
(Green)
OUTPUT
VOLTAGE
MARKING
NUMBER
G5719BT11U
G5719BTB1U
G5719BRC1U
519Bx
519Bx
519B
Adjustable
Adjustable
Adjustable
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
SOT-23-5
SOT-23-6
TDFN2X2-8
Note: T1: SOT-23-5 TB: SOT-23-6 RC: TDFN2X2-8
1: Bonding Code
U: Tape & Reel
Pin Configuration
Typical Application Circuit
G5719B
1
2
3
5
EN
GND
LX
VFB
R
10k
G5719B
G5719B
VIN
VIN
4~6V
PG
VIN
2.2µH
VOUT
3.3V
2A
4
VIN
8
VFB
GND
1
2
LX
C
FB* (option)
SOT-23-5
G5719B
PG
7
6
EN
LX
CIN
2.2µF
CER
Thermal
COUT
10µF
CER
Pad
VIN
3
EN
VFB
GND
4
5
NC
GND
1
2
3
6
5
4
VFB
PG
EN
GND
LX
R1
82k
R2
18k
TDFN2X2-8
R1
R2
V
OUT = 0.6V • (1+
)
VIN
SOT-23-6
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 0.5
Sep 25, 2013
1
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