2
LTC3716
ORDER PART
NUMBER
LTC3716EG
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
T
JMAX
= 125°C, θ
JA
= 85°C/W
Consult factory for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 15V, V
BIAS
= 5V, V
RUN/SS
= 5V unless otherwise noted.
(Note 1)
Input Supply Voltage (V
IN
).........................36V to –0.3V
Topside Driver Voltages (BOOST1,2).........42V to –0.3V
Switch Voltage (SW1, 2) .............................36V to –5 V
SENSE1
+
, SENSE2
+
, SENSE1
–
,
SENSE2
–
Voltages ...................(1.1)INTV
CC
to –0.3V
EAIN, V
OS
+
, V
OS
–
, EXTV
CC
, INTV
CC
, RUN/SS,
V
BIAS
, ATTENIN, ATTENOUT, PGOOD, AMPMD,
VID0–VID4, Voltages ...............................7V to –0.3V
Boosted Driver Voltage (BOOST-SW) ..........7V to –0.3V
PLLFLTR, PLLIN, V
DIFFOUT
,
FCB Voltages ................................... INTV
CC
to –0.3V
I
TH
Voltage................................................2.7V to –0.3V
Peak Output Current <1µs(TG1, 2, BG1, 2)................ 3A
INTV
CC
RMS Output Current................................ 50mA
Operating Ambient Temperature Range
(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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
TOP VIEW
G PACKAGE
36-LEAD PLASTIC SSOP
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
RUN/SS
SENSE1
+
SENSE1
–
EAIN
PLLFLTR
PLLIN
FCB
I
TH
SGND
V
DIFFOUT
V
OS
–
V
OS
+
SENSE2
–
SENSE2
+
ATTENOUT
ATTENIN
VID0
VID1
PGOOD
TG1
SW1
BOOST1
V
IN
BG1
EXTV
CC
INTV
CC
PGND
BG2
BOOST2
SW2
TG2
AMPMD
V
BIAS
VID4
VID3
VID2
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Main Control Loop
V
EAIN
Regulated Feedback Voltage I
TH
Voltage = 1.2V; Measured at V
EAIN
(Note 4) ● 0.594 0.600 0.606 V
V
SENSEMAX
Maximum Current Sense Threshold ● 62 75 88 mV
I
INEAIN
Feedback Current (Note 4) –5 –50 nA
V
LOADREG
Output Voltage Load Regulation (Note 4)
Measured in Servo Loop, ∆I
TH
Voltage: 1.2V to 0.7V ● 0.1 0.5 %
Measured in Servo Loop, ∆I
TH
Voltage: 1.2V to 2V ● –0.1 –0.5 %
V
REFLNREG
Reference Voltage Line Regulation V
IN
= 3.6V to 30V (Note 4) 0.002 0.02 %/V
V
FCB
Forced Continuous Threshold ● 0.57 0.6 0.63 V
I
FCB
Forced Continuous Current – 0.17 –1 µA
V
BINHIBIT
Burst Inhibit (Constant Frequency) Measured at FCB pin 4.3 4.8 V
Threshold
V
OVL
Output Overvoltage Threshold Measured at V
EAIN
● 0.64 0.66 0.68 V
UVLO Undervoltage Lockout V
IN
Ramping Down 3 3.33 4 V
g
m
Transconductance Amplifier g
m
I
TH
= 1.2V, Sink/Source 5µA (Note 4) 3 mmho
g
mOL
Transconductance Amplifier Gain I
TH
= 1.2V, (g
m
•
Z
L
; No Ext Load) (Note 4) 1.5 V/mV