Datasheet
LTC3714
2
3714f
pin conFiguraTionabsoluTe MaxiMuM raTings
Input Supply Voltage (V
IN
), I
ON
.................. 36V to –0.3V
Boosted Topside Driver Supply Voltage
(BOOST) ................................................... 42V to –0.3V
SW, SENSE Voltages .................................... 36V to –5V
EXTV
CC
, (BOOST – SW), RUN/SS, VID0-VID4,
PGOOD, FCB Voltages ................................ 7V to –0.3V
V
ON
, V
RNG
Voltages ................. (INTV
CC
+ 0.3V) to –0.3V
I
TH
, V
FB
, V
OSENSE
Voltages ....................... 2.7V to –0.3V
TG, BG, INTV
CC
, EXTV
CC
Peak Currents .................... 2A
TG, BG, INTV
CC
, EXTV
CC
RMS Currents ............... 50mA
OPV
IN
, OP
+
, OP
–
..............................................0V to 18V
Operating Ambient Temperature Range
LTC3714EG (Note 2) ............................–40°C to 85°C
Junction Temperature (Note 3) ............................ 125°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec) ...................300°C
(Note 1)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
TOP VIEW
G PACKAGE
28-LEAD PLASTIC SSOP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
BG
PGND
SENSE
SW
TG
BOOST
VID0
VID1
VID2
RUN/SS
V
ON
PGOOD
V
RNG
I
TH
INTV
CC
V
IN
EXTV
CC
VID4
VID3
V
OSENSE
VFB
I
ON
FCB
SGND
OPOUT
OP
+
OP
–
OPV
IN
T
JMAX
= 125°C, θ
JA
= 130°C/W
ORDER PART
NUMBER
LTC3714EG
Consult LTC Marketing for parts specified with wider operating temperature ranges.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Main Control Loop
I
Q
Input DC Supply Current
Normal
Shutdown Supply Current
900
15
2000
30
µA
µA
V
FB
Feedback Reference Voltage I
TH
= 1.2V (Note 4)
l
0.594 0.600 0.606 V
∆V
FB(LINEREG)
Feedback Voltage Line Regulation V
IN
= 4V to 30V (Note 4), I
TH
= 1.2V 0.002 %/V
∆V
FB(LOADREG)
Feedback Voltage Load Regulation I
TH
= 0.5V to 1.9V (Note 4)
l
–0.05 –0.3 %
g
m(EA)
Error Amplifier Transconductance I
TH
= 1.2V (Note 4)
l
1.4 1.7 2 ms
V
FCB
Forced Continuous Threshold
l
0.57 0.6 0.63 V
I
FCB
Forced Continuous Current V
FCB
= 0.6V –1 –2 µA
t
ON
On-Time I
ON
= 60µA, V
ON
= 1.5V 200 250 300 ns
t
ON(MIN)
Minimum On-Time I
ON
= 180µA, V
ON
= 0V 50 100 ns
t
OFF(MIN)
Minimum Off-Time I
ON
= 60µA, V
ON
= 1.5V 250 400 ns
V
SENSE(MAX)
Maximum Current Sense Threshold V
RNG
= 1V, V
FB
= 0.56V
V
RNG
= 0V, V
FB
= 0.56V
V
RNG
= INTV
CC
, V
FB
= 0.56V
l
l
l
113
79
158
133
93
186
153
107
214
mV
mV
mV
V
SENSE(MIN)
Minimum Current Sense Threshold V
RNG
= 1V, V
FB
= 0.64V
V
RNG
= 0V, V
FB
= 0.64V
V
RNG
= INTV
CC
, V
FB
= 0.64V
–67
–33
–93
mV
mV
mV
∆V
FB(OV)
Output Overvoltage Fault Threshold 7.5 10 12.5 %
∆V
FB(UV)
Output Undervoltage Fault Threshold 340 400 460 mV
V
RUN/SS(ON)
RUN Pin Start Threshold
l
0.8 1.5 2 V
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.