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參數(shù)資料
| 型號： | L6928TR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1.65 A SWITCHING REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 3 MM, LEAD FREE, MSOP-8 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大?。?/td> | 189K |
| 代理商： | L6928TR |
October 2006
Rev 4
1/16
16
L6928
High efficiency monolithic synchronous step down regulator
General features
■ 2V to 5.5V battery input range
■ High efficiency: up to 95%
■ Internal synchronous switch
■ No external schottky required
■ Extremely low quiescent current
■ 1
A max shutdown supply current
■ 800mA max output current
■ Adjustable output voltage from 0.6V
■ Low drop-out operation: up to 100% duty cycle
■ Selectable low noise/low consumption mode at
light load
■ Power good signal
■ ±1% output voltage accuracy
■ Current-mode control
■ 1.4MHz switching frequency
■ Externally synchronizable
from 1MHz to 2MHz
■ OVP
■ Short circuit protection
Applications
■ Battery-powered equipments
■ Portable instruments
■ Cellular phones
■ PDAs and hand held terminals
■ DSC
■ GPS
Description
The device is dc-dc monolithic regulator
specifically designed to provide extremely high
efficiency.
L6928 supply voltage can be as low as 2V
allowing its use in single Li-ion cell supplied
applications. Output voltage can be selected by
an external divider down to 0.6V. Duty Cycle can
saturate to 100% allowing low drop-out operation.
The device is based on a 1.4MHz fixed-frequency,
current mode-architecture.
Low Consumption Mode operation can be
selected at light load conditions, allowing
switching losses to be reduced. L6928 is
externally synchronizable with a clock which
makes it useful in noise-sensitive applications.
Other features like Powergood, Overvoltage
protection, Shortcircuit protection and Thermal
Shutdown (150°C) are also present.
MSOP8
VFQFPN8
Application test circuit
L 4.7
H
SYNC
LX
VFB
C1
10
F
6.3V
C2
220pF
C4
10
F
6.3V
R2
200K
R3
500K
R1
100K
VIN=2V to 5.5V
VOUT=1.8V
VCC
RUN
COMP
GND
PGOOD
D01IN1528
7
6
1
8
3
5
24
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