Datasheet

2
LTC3701
3701fa
(Note 1)
Input Supply Voltage (V
IN
)........................ –0.3V to 10V
SENSE1
–
, SENSE2
–
, PGATE1, PGATE2,
PLLLPF, SENSE1
+
, SENSE2
+
,
EXTCLK/MODE Voltages .............. –0.3V to (V
IN
+ 0.3V)
V
FB1
, V
FB2
, I
TH
/RUN1,
I
TH
/RUN2 Voltages .................................. –0.3V to 2.4V
PGOOD Voltage ........................................ –0.3V to 10V
PGATE1, PGATE2 Peak Output Current (<10µs)....... 1A
Operating Ambient Temperature Range
(Note 2) ...................................................–40°C to 85°C
Storage Ambient Temperature Range ... –65°C to 150°C
Junction Temperature (Note 3)............................ 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are T
A
= 25°C. V
IN
= 4.2V unless otherwise noted.
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
ORDER PART
NUMBER
LTC3701EGN
ELECTRICAL CHARACTERISTICS
T
JMAX
= 150°C, θ
JA
= 140°C/W
GN PACKAGE
16-LEAD PLASTIC SSOP
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
SENSE1
–
I
TH
/RUN1
V
FB1
SGND
V
FB2
I
TH
/RUN2
PLLLPF
SENSE2
–
SENSE1
+
V
IN
PGATE1
PGND
PGATE2
PGOOD
EXTCLK/MODE
SENSE2
+
PARAMETER CONDITIONS MIN TYP MAX UNITS
Main Control Loops
Input DC Supply Current (Note 4)
Normal Operation 2.5V < V
IN
< 9.8V 460 780 µA
Sleep Mode 2.5V < V
IN
< 9.8V 305 470 µA
Shutdown 2.5V < V
IN
< 9.8V, I
TH
/RUN1 = I
TH
/RUN2 = 0V 9 28 µA
UVLO V
IN
< UVLO Threshold 18 30 µA
Undervoltage Lockout Threshold V
IN
Falling ● 1.55 2.00 2.50 V
V
IN
Rising 1.70 2.12 2.55 V
Shutdown Threshold at I
TH
/RUN1, 2 0.2 0.35 0.5 V
Start-Up Current Source on I
TH
/RUN1, 2 V
ITH
/RUN1, 2 = 0V 0.25 0.5 0.85 µA
Regulated Feedback Voltage 0°C to 70°C (Note 5), I
TH
/RUN = 1.3V ● 0.784 0.8 0.816 V
–40°C to 85°C (Note 5)
● 0.774 0.8 0.826 V
Output Voltage Line Regulation 2.5V < V
IN
< 9.8V (Note 5) 0.05 0.20 mV/V
Output Voltage Load Regulation I
TH
/RUN = 0.9V (Note 5) 0.2 0.8 %
I
TH
/RUN = 1.6V –0.2 –0.8 %
V
FB1, 2
Input Current (Note 5) 10 50 nA
Output Overvoltage Protect Threshold Measured at V
FB
0.835 0.88 0.930 V
Output Overvoltage Protect Hysteresis 20 mV
Gate Drive 1, 2 Rise Time C
L
= 3000pF 40 ns
Gate Drive 1, 2 Fall Time C
L
= 3000pF 40 ns
Maximum Current Sense Voltage (SENSE
+
– SENSE
–
) (Note 6) 95 120 145 mV
Soft-Start
Current Sense Voltage Step 30 mV
Time to Maximum Sense Voltage 2048 Cycles
GN PART
MARKING
3701
Consult LTC Marketing for parts specified with wider operating temperature ranges.