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L6995D Datasheet(PDF) 1 Page - STMicroelectronics

No. de pieza L6995D
Descripción Electrónicos  STEP DOWN CONTROLLER FOR HIGH DIFFERENTIAL INPUT-OUTPUT CONVERSION
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6995D Datasheet(HTML) 1 Page - STMicroelectronics

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L6995
December 2002
FEATURE
s
CONSTANT ON TIME TOPOLOGY ALLOWS
OPERATION WITH LOWER DUTY THAN
PWM TOPOLOGY
s
VERY FAST LOAD TRANSIENTS
s
5V Vcc SUPPLY
s
1.5V TO 28V INPUT VOLTAGE RANGE
s
0.9V ±1% VREF
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
µA 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
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.
TSSOP20
ORDERING NUMBERS: L6995D
L6995DTR
STEP DOWN CONTROLLER FOR HIGH DIFFERENTIAL
INPUT-OUTPUT CONVERSION
This is preliminary information on a new product now in development. Details are subject to change without notice.
MINIMUM COMPONENT COUNT APPLICATION
SS
C
C
BOOT
OUT
C
0.9V
Vo
L6995
28V
Rin2
Rin1
CIN
RILIM
5V
INT
VFB
SS
OSC
BOOT
HGATE
PHASE
LGATE
PGND
GND
NOSKIP
ILIM
VSENSE
VREF
5V
VREF
C
L
BOOT
D
HS
LS
DS


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