Datasheet

LTC3714
3
3714f
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 15V unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
RUN/SS(LE)
RUN Pin Latchoff Enable Threshold RUN/SS Pin Rising 4 4.5 V
V
RUN/SS(LT)
RUN Pin Latchoff Threshold RUN/SS Pin Falling 3.5 4.2 V
I
RUN/SS(C)
Soft-Start Charge Current –0.5 –1.2 –3 µA
I
RUN/SS(D)
Soft-Start Discharge Current 0.8 1.8 3 µA
V
IN(UVLO)
Undervoltage Lockout Threshold V
IN
Falling
l
3.4 3.9 V
V
IN(UVLOR)
Undervoltage Lockout Threshold V
IN
Rising
l
3.5 4 V
TG R
UP
TG Driver Pull-Up On Resistance TG High 2 3 Ω
TG R
DOWN
TG Driver Pull-Down On Resistance TG Low 2 3 Ω
BG R
UP
BG Driver Pull-Up On Resistance BG High 3 4 Ω
BG R
DOWN
BG Driver Pull-Down On Resistance BG Low 1 2 Ω
TG t
r
TG Rise Time C
LOAD
= 3300pF 20 ns
TG t
f
TG Fall Time C
LOAD
= 3300pF 20 ns
BG t
r
BG Rise Time C
LOAD
= 3300pF 20 ns
BG t
f
BG Fall Time C
LOAD
= 3300pF 20 ns
Internal V
CC
Regulator
V
INTVCC
Internal V
CC
Voltage 6V < V
IN
< 30V, V
EXTVCC
= 4V
l
4.7 5 5.3 V
∆V
LDO(LOADREG)
Internal V
CC
Load Regulation I
CC
= 0mA to 20mA, V
EXTVCC
= 4V –0.1 ±2 %
V
EXTVCC
EXTV
CC
Switchover Voltage I
CC
= 20mA, V
EXTVCC
Rising
l
4.5 4.7 V
∆V
EXTVCC
EXTV
CC
Switch Drop Voltage I
CC
= 20mA, V
EXTVCC
= 5V 150 300 mV
∆V
EXTVCC(HYS)
EXTV
CC
Switchover Hysteresis 200 mV
PGOOD Output
∆V
FBH
PGOOD Upper Threshold V
FB
Rising 7.5 10 12.5 %
∆V
FBL
PGOOD Lower Threshold V
FB
Falling –7.5 –10 –12.5 %
∆V
FB(HYS)
PGOOD Hysteresis V
FB
Returning 1 2.5 %
V
PGL
PGOOD Low Voltage I
PGOOD
= 1mA 0.15 0.4 V
VID DAC
V
VID(T)
VID0-VID4 Logic Threshold Voltage 0.4 1.2 2 V
I
VID(PULLUP)
VID0-VID4 Pull-Up Current V
VID0
to V
VID4
= 0V –2.5 µA
V
VID(PULLUP)
VID0-VID4 Pull-Up Voltage V
VID0
to V
VID4
Open 4.5 V
I
VID(LEAK)
VID0-VID4 Leakage Current V
VID0
to V
VID4
= 5V, V
RUN/SS
= 0V 0.01 1 µA
R
VID
Resistance from V
OSENSE
to V
FB
6 10 14
∆V
OSENSE
DAC Output Accuracy V
OSENSE
Programmed from
0.6V to 1.75V (Note 5)
–0.45 0 0.25 %
V
IN
= 5V unless otherwise noted.
Internal Op Amp
V
OS
Input Offset Voltage 400 1000 µV
I
OS
Input Offset Current 4 10 nA
I
B
Input Bias Current 45 80 nA
CMRR Common Mode Rejection Ratio V
CM
= 0V to (V
CC
– 1V)
V
CM
= 0V to 18V
100
80
dB
dB