LTC3707 Linear Technology, LTC3707 Datasheet - Page 2

• Manufacturer Part Number: LTC3707
• Description: High Efficiency / 2-Phase Synchronous Step-Down Switching Regulator
• Manufacturer: Linear Technology

ABSOLUTE AXI U RATI GS
LTC3707
(Note 1)
Input Supply Voltage (V
Top Side Driver Voltages
(BOOST1, BOOST2) ...................................36V to – 0.3V
Switch Voltage (SW1, SW2) .........................30V to – 5V
INTV
(BOOST2-SW2), PGOOD .............................7V to – 0.3V
SENSE1
SENSE2
FREQSET, STBYMD, FCB Voltage ........ INTV
I
Peak Output Current <10 s (TG1, TG2, BG1, BG2) ... 3A
INTV
Operating Temperature Range
Junction Temperature (Note 3) ............................. 125 C
Storage Temperature Range ................. – 65 C to 150 C
Lead Temperature (Soldering, 10 sec).................. 300 C
temperature range, otherwise specifications are at T
SYMBOL
Main Control Loops
V
I
V
V
g
g
I
V
I
V
UVLO
V
I
V
ELECTRICAL CHARACTERISTICS
2
VOSENSE1, 2
Q
FCB
SENSE
TH1,
m1, 2
mGBW1, 2
OSENSE1, 2
REFLNREG
LOADREG
FCB
BINHIBIT
OVL
STBYMD MS
LTC3707EG (Note 2) .......................... – 40 C to 85 C
CC,
CC
I
TH2
Peak Output Current ................................ 40mA
EXTV
+
–
, V
, SENSE2
Voltages ........................ (1.1)INTV
PARAMETER
Regulated Feedback Voltage
Feedback Current
Reference Voltage Line Regulation
Output Voltage Load Regulation
Transconductance Amplifier g
Transconductance Amplifier GBW
Input DC Supply Current
Forced Continuous Threshold
Forced Continuous Pin Current
Burst Inhibit (Constant Frequency)
Threshold
Undervoltage Lockout
Feedback Overvoltage Lockout
Sense Pins Total Source Current
Master Shutdown Threshold
OSENSE1
CC
Normal Mode
Standby
Shutdown
, RUN/SS1, RUN/SS2, (BOOST1-SW1),
W
+
, V
, SENSE1
OSENSE2
IN
).........................30V to – 0.3V
W W
–
,
Voltages ...2.7V to – 0.3V
m
CONDITIONS
(Note 4); I
(Note 4)
V
(Note 4)
Measured in Servo Loop; I
Measured in Servo Loop; I
I
I
(Note 5)
EXTV
V
V
V
Measured at FCB pin
V
Measured at V
(Each Channel); V
V
TH1, 2
TH1, 2
IN
RUN/SS1, 2
RUN/SS1, 2
FCB
IN
STBYMD
Ramping Down
U
= 3.6V to 30V (Note 4)
CC
CC
= 0.85V
CC
A
= 1.2V; Sink/Source 5uA; (Note 4)
= 1.2V; (Note 4)
= 25 C. V
Tied to V
to – 0.3V
to – 0.3V
Ramping Down
TH1, 2
= 0V, V
= 0V, V
The
OSENSE1, 2
Voltage = 1.2V
OUT1
SENSE1
STBYMD
STBYMD
IN
denotes the specifications which apply over the full operating
= 15V, V
; V
OUT1
–
PACKAGE/ORDER I FOR ATIO
, 2
Consult LTC Marketing for parts specified with wider operating temperature ranges.
> 2V
= Open
TH
TH
– = V
= 5V
Voltage = 1.2V to 0.7V
Voltage = 1.2V to 2.0V
V
V
RUN/SS1
SENSE1
SENSE1
FREQSET
SENSE2
SENSE2
RUN/SS1, 2
STBYMD
OSENSE1
3.3V
OSENSE2
SENSE1
SGND
I
I
FCB
OUT
TH1
TH2
+
–
–
+
T
JMAX
+
28-LEAD PLASTIC SSOP
10
11
12
13
14
, 2
1
2
3
4
5
6
7
8
9
= 5V unless otherwise noted.
+ = 0V
= 125 C,
GN PACKAGE
TOP VIEW
JA
= 95 C/W
28
27
26
25
24
23
22
21
20
19
18
17
16
15
– 0.30
PGOOD
TG1
SW1
BOOST1
V
BG1
EXTV
INTV
PGND
BG2
BOOST2
SW2
TG2
RUN/SS2
0.788
0.76
0.84
MIN
– 90
IN
0.4
CC
CC
U
– 0.18
0.800
0.002
0.800
– 0.1
0.86
TYP
– 60
350
125
0.1
1.3
4.3
3.5
0.6
– 5
20
3
ORDER PART
W
LTC3707EGN
NUMBER
0.812
MAX
– 0.5
– 0.1
– 50
0.02
0.84
0.88
0.5
4.8
35
4
UNITS
mmho
U
3707f
MHz
%/V
nA
%
%
V
A
A
A
V
A
V
V
V
A
V