Linear Technology No Rsense LTC3736, Datasheet

Page: 2 / 28

2
LTC3736
3736fa
Input Supply Voltage (V
IN
) ........................ – 0.3V to 10V
PLLLPF, RUN/SS, SYNC/FCB,
TRACK, SENSE1
+
, SENSE2
+
,
IPRG1, IPRG2 Voltages ................. – 0.3V to (V
IN
+ 0.3V)
V
FB1
, V
FB2
, I
TH1
, I
TH2
Voltages .................. – 0.3V to 2.4V
SW1, SW2 Voltages ............ –2V to V
IN
+ 1V or 10V Max
PGOOD ..................................................... – 0.3V to 10V
ABSOLUTE AXI U RATI GS
W W W U
(Note 1)
TG1, TG2, BG1, BG2 Peak Output Current (<10
µ
s) ..... 1A
Operating Temperature Range (Note 2) ... –40
°
C to 85
°
C
Storage Temperature Range .................. –65
°
C to 125
°
C
Junction Temperature (Note 3) ............................ 125
°
C
Lead Temperature (Soldering, 10 sec)
(LTC3736EGN) ..................................................... 300
°
C
PACKAGE/ORDER I FOR ATIO
U U W
24 23 22 21 20 19
7 8 9
TOP VIEW
25
UF PACKAGE
24-LEAD (4mm × 4mm) PLASTIC QFN
10 11 12
6
5
4
3
2
1
13
14
15
16
17
18
I
TH1
IPRG2
PLLLPF
SGND
V
IN
TRACK
SYNC/FCB
TG1
PGND
TG2
RUN/SS
BG2
V
FB1
IPRG1 SW1 SENSE1
+
PGND BG1
V
FB2
I
TH2
PGOOD
SW2
SENSE2
+
PGND
T
JMAX
= 125
°
C,
θ
JA
= 37
°
C/W
EXPOSED PAD (PIN 25) IS PGND
MUST BE SOLDERED TO PCB
1
2
3
4
5
6
7
8
9
10
11
12
TOP VIEW
GN PACKAGE
24-LEAD PLASTIC SSOP
24
23
22
21
20
19
18
17
16
15
14
13
SW1
IPRG1
V
FB1
I
TH1
IPRG2
PLLLPF
SGND
V
IN
TRACK
V
FB2
I
TH2
PGOOD
SENSE1
+
PGND
BG1
SYNC/FCB
TG1
PGND
TG2
RUN/SS
BG2
PGND
SENSE2
+
SW2
ORDER PART
NUMBER
UF PART MARKING
3736
LTC3736EUF
T
JMAX
= 125 ° C, θ
JA
= 130 ° C/ W
ORDER PART
NUMBER
LTC3736EGN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The
●
denotes specifications that apply over the full operating temperature
range, otherwise specifications are at T
A
= 25
°
C. V
IN
= 4.2V unless otherwise specified.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Main Control Loops
Input DC Supply Current (Note 4)
Sleep Mode 300 425 µ A
Shutdown RUN/SS = 0V 9 20
µ
A
UVLO V
IN
= UVLO Threshold –200mV 3 10 µ A
Undervoltage Lockout Threshold V
IN
Falling
●
1.95 2.25 2.55 V
V
IN
Rising
●
2.15 2.45 2.75 V
Shutdown Threshold at RUN/SS 0.45 0.65 0.85 V
Start-Up Current Source RUN/SS = 0V 0.4 0.7 1
µ
A
Regulated Feedback Voltage 0
°
C to 85
°
C (Note 5) 0.591 0.6 0.609 V
–40 ° C to 85 ° C
●
0.588 0.6 0.612 V
Output Voltage Line Regulation 2.75V < V
IN
< 9.8V (Note 5) 0.05 0.2 mV/V