Datasheet

SWITCH
CONTROL
SWITCH
ARRAY
G =
,
GAIN
CONTROL
2
1.24V
Ref.
Soft-Start
Ramp
OSCILLATOR
EN
3
2
GND
C2-
C2+
C1-
C1+
LM2757
M0
M1
VOLTAGE MODE
SELECT AND
ENABLE CONTROL
SHORT-
CIRCUIT
PROTECTION
THERMAL
SHUTDOWN
V Ref
V
OUT
V
IN
LM2757
www.ti.com SNVS536E –OCTOBER 2007–REVISED MAY 2013
Electrical Characteristics (continued)
(1) (2)
Limits in standard typeface are for T
A
= 25ºC. Limits in boldface type apply over the full operating ambient temperature range
(-30°C ≤ T
A
≤ +85°C) . Unless otherwise noted, specifications apply to the Typical Application Circuit (pg. 1) with: V
IN
= 3.6V,
V(M0) = 0V, V(M1) = V
IN
,C
IN
= C
2
= 0.47 µF, C
IN
= C
OUT
= 1.0 µF
(3)
.
Symbol Parameter Condition Min Typ Max Units
V
OUT
Turn-On Time from
I
ON
300 µs
Shutdown
(5)
(5) Turn-on time is measured from when the M0 or M1 signal is pulled high until the output voltage crosses 90% of its final value.
Block Diagram
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