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L6928D Datasheet

  • L6928D

  • HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR

  • 9頁(yè)

  • STMICROELECTRONICS   STMICROELECTRONICS

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L6928D
HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS
STEP DOWN REGULATOR
1
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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碌A(chǔ) MAX SHUTDOWN SUPPLY CURRENT
800mA MAX OUTPUT CURRENT
ADJUSTABLE OUTPUT VOLTAGE FROM 0.6V
LOW DROP-OUT OPERATION: UP TO100%
DUTY CYCLE
SELECTABLE LOW NOISE/LOW
CONSUMPTION MODE AT LIGHT LOAD
POWER GOOD SIGNAL
鹵1% OUTPUT VOLTAGE ACCURACY
CURRENT-MODE CONTROL
1.4MHz SWITCHING FREQUENCY
EXTERNALLY SYNCHRONIZABLE FROM
1MHz TO 2MHz
OVP
SHORT CIRCUIT PROTECTION
Figure 1. Packages
MSOP8
Table 1. Order Codes
Part Number
L6928D
L6928D013TR
Package
MSOP8 in Tube
MSOP8 in Tape & Reel
3
DESCRIPTION
2
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APPLICATIONS
BATTERY-POWERED EQUIPMENTS
PORTABLE INSTRUMENTS
CELLULAR PHONES
PDAs AND HAND HELD TERMINALS
DSC
GPS
The device is dc-dc monolithic regulator specifically
designed to provide extremely high efficiency.
L6928D supply voltage can be as low as 2V allowing
its use in single Li-ion cell supplied applications. Out-
put voltage can be selected by an external divider
down to 0.6V. Duty Cycle can saturate to 100% al-
lowing low drop-out operation. The device is based
on a 1.4MHz fixed-frequency, current mode-architec-
ture. Low Consumption Mode operation can be se-
lected at light load conditions, allowing switching
losses to be reduced. L6928D is externally synchro-
nizable with a clock which makes it useful in noise-
sensitive applications. Other features like Power-
good, Overvoltage protection, Shortcircuit protection
and Thermal Shutdown (150擄C) are also present.
Figure 2. Application Test Circuit
L 4.7碌H
V
IN
=2V to 5.5V
C1
10碌F
6.3V
SYNC
V
CC
RUN
5
7
6
1
2
COMP
D01IN1528
V
OUT
=1.8V
R2
200K
C4
10碌F
6.3V
LX
R3
500K
8
PGOOD
4
C2
220pF
3
VFB
GND
R1
100K
February 2005
Rev. 2
1/9

L6928D 產(chǎn)品屬性

  • L6928 View All Specifications

  • 100

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器

  • -

  • 降壓（降壓）

  • 可調(diào)式

  • 1

  • 0.6 V ~ 5.5 V

  • 2 V ~ 5.5 V

  • 電流模式

  • 1.4MHz

  • 800mA

  • 是

  • -40°C ~ 125°C

  • 表面貼裝

  • 8-TSSOP，8-MSOP（0.118"，3.00mm 寬）

  • 管件

  • 8-MSOP

  • 497-4745-ND - BOARD EVAL L6928 STEP DOWN REG

L6928D相關(guān)型號(hào)PDF文件下載

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