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L6995STR Datasheet

  • L6995STR

  • IC CTRLR STPDWN HI DIFF 20TSSOP

  • 26頁

  • STMicroelectronics   STMicroelectronics

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L6995
STEP DOWN CONTROLLER FOR HIGH DIFFERENTIAL
INPUT-OUTPUT CONVERSION
FEATURE
s
CONSTANT ON TIME TOPOLOGY ALLOWS
OPERATION WITH LOWER DUTY THAN
PWM TOPOLOGY
s
VERY FAST LOAD TRANSIENTS
s
5V V
cc
SUPPLY
s
1.5V TO 28V INPUT VOLTAGE RANGE
s
0.9V 鹵1% V
REF
s
MINIMUM OUTPUT VOLTAGE AS LOW AS 0.9V
s
SELECTABLE SINKING MODE
s
LOSSLESS CURRENT LIMIT
s
REMOTE SENSING
s
OVP,UVP LATCHED PROTECTIONS
s
600碌A(chǔ) TYP QUIESCENT CURRENT
s
POWER GOOD AND OVP SIGNALS
s
PULSE SKIPPING AT LIGHT LOADS
APPLICATIONS
s
I/O BUS FOR CPU CORE SUPPLY
s
NOTEBOOK COMPUTERS
s
NETWORKING DC-DC
s
DISTRIBUTED POWER
TSSOP20
ORDERING NUMBERS: L6995D
L6995DTR
DESCRIPTION
The device is a step-down controller specifically de-
signed to provide extremely high efficiency conver-
sion, with losses current sensing tecnique.
The "constant on-time" topology assures fast load
transient response. The embedded "voltage feed-for-
ward" provides nearly constant switching frequency
operation.
An integrator can be introduced in the control loop to
reduce the static output voltage error.
The available remote sensing improve the static and
dynamic regulation recovering the wires voltage
drop. Pulse skipping technique reduces power con-
sumption at light load. Drivers current capability al-
lows output current in excess of 20A.
28V
MINIMUM COMPONENT COUNT APPLICATION
Rin2
Rin1
5V
CIN
SHDN
VCC
VDR
OSC
BOOT
HGATE
5V
C
HS
D
BOOT
BOOT
Vo
L
PHASE
LGATE
RILIM
ILIM
PGND
LS
0.9V
C
OUT
DS
L6995
SS
GND
NOSKIP
VSENSE
C
SS
INT
VFB
VREF
C
VREF
December 2002
This is preliminary information on a new product now in development. Details are subject to change without notice.
1/25

L6995STR 產(chǎn)品屬性

  • 2,500

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 切換控制器

  • -

  • 控制器

  • 1

  • -

  • -

  • 4.3 V ~ 6 V

  • 是

  • 無

  • 無

  • 無

  • 無

  • 無

  • 無

  • 無

  • 0°C ~ 85°C

  • 20-TSSOP（0.173"，4.40mm 寬）

  • 帶卷 (TR)

  • 497-4224-2

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