LTC3708 LINER [Linear Technology], LTC3708 Datasheet - Page 2

• Manufacturer Part Number: LTC3708
• Description: Fast 2-Phase, No RSENSE Buck Controller with Output Tracking
• Manufacturer: LINER [Linear Technology]

ABSOLUTE MAXIMUM RATINGS
LTC3708
(Note 1)
ORDER INFORMATION
LEAD FREE FINISH
LTC3708EUH#PBF
LEAD BASED FINISH
LTC3708EUH
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
For more information on lead free part marking, go to:
For more information on tape and reel specifi cations, go to:
ELECTRICAL CHARACTERISTICS
Input Supply Voltage (V
Boosted Topside Driver Supply Voltage
Switch Voltage (SW1, 2) .............................. 36V to –5V
SENSE1
SENSE1
I
(BOOST – SW) Voltages .............................. 7V to –0.3V
RUN/SS, PGOOD Voltages .......................... 7V to –0.3V
PGOOD DC Current ................................................. 5mA
TRACK1, TRACK2 Voltages ..............V
V
I
V
INTLPF , EXTLPF Voltages ......................... 2.7V to –0.3V
FCB Voltages ............................................... 7V to –0.3V
Operating Temperature Range (Note 5).... –40°C to 85°C
Junction Temperature (Note 2) ........................... 125°C
Storage Temperature Range ................... –65°C to 125°C
Refl ow Peak Body Temperature ........................... 260°C
SYMBOL
Main Control Loop
I
I
V
V
ΔV
2
temperature range, otherwise specifi cations are at T
Q
FB1,2
ON1
TH1
REF
FB1,2
RNG1
FB1
FB(LINEREG)1,2
BOOST1, 2 ............................................ 42V to –0.3V
, I
, I
, V
TH2
, V
ON2
FB2
+
–
RNG2
, SENSE2
, SENSE2
Voltages.................................... 2.7V to –0.3V
Voltages .................................... 21V to –0.3V
Voltages .................................. 2.7V to –0.3V
Voltages .................... V
PARAMETER
Input DC Supply Current
Feedback Pin Input Current
Internal Reference Voltage
Feedback Voltage
Feedback Voltage Line Regulation
Normal
Shutdown
+
–
Voltages ....................... 36V to –5V
Voltages .................... 10V to –0.3V
TAPE AND REEL
LTC3708EUH#TRPBF
TAPE AND REEL
LTC3708EUH#TR
CC
, DRV
CC
) ............. 7V to –0.3V
CC
CC
+ 0.3V to –0.3V
+ 0.3V to –0.3V
http://www.linear.com/leadfree/
PART MARKING
3708
PART MARKING
3708
http://www.linear.com/tapeandreel/
A
CONDITIONS
I
I
I
I
V
= 25°C. V
TH
TH
TH
TH
CC
= 1.2V (Notes 3, 4)
= 1.2V, 0°C to 85°C (Notes 3, 4)
= 1.2V (Notes 3, 4)
= 1.2V (Note 3)
= 4.5V to 6.5V (Note 3)
The
l
CC
denotes the specifi cations which apply over the full operating
= 5V, DRV
PIN CONFIGURATION
PACKAGE DESCRIPTION
32-Lead (5mm × 5mm) Plastic QFN
PACKAGE DESCRIPTION
32-Lead (5mm × 5mm) Plastic QFN
CC
= 5V, unless otherwise noted.
RUN/SS
TRACK1
TRACK2
EXPOSED PAD (PIN 33) IS SGND, MUST BE SOLDERED TO PCB
SGND
V
V
I
I
TH1
TH2
FB1
FB2
1
2
3
4
5
6
7
8
32-LEAD (5mm 5mm) PLASTIC QFN
32 31 30 29 28 27 26 25
9 10 11 12
l
T
JMAX
= 125°C, θ
UH PACKAGE
TOP VIEW
0.594
0.591
0.594
MIN
33
13 14 15 16
JA
= 34°C/W
0.600
0.600
0.600
0.02
TYP
250
–50
TEMPERATURE RANGE
–40°C to 85°C
TEMPERATURE RANGE
–40°C to 85°C
2.4
24
23
22
21
20
19
18
17
SENSE1
PGND1
BG1
DRV
BG2
PGND2
SENSE2
V
CC
0.606
0.609
0.606
–100
CC
MAX
400
3
–
–
UNITS
3708fb
%/V
mA
μA
nA
V
V
V