lt3742 Linear Technology Corporation, lt3742 Datasheet - Page 2

• Manufacturer Part Number: lt3742
• Description: Dual, 2-phase Step-down Switching Controller
• Manufacturer: Linear Technology Corporation

ABSOLUTE MAXIMUM RATINGS
ORDER INFORMATION
ELECTRICAL CHARACTERISTICS
LT3742
(Note 1)
V
UVLO Voltage ............................................................30V
PG1, PG2 Voltage .....................................................30V
SWB, BIAS Voltage ...................................................40V
SENSE1
SENSE1
RUN/SS1, RUN/SS2 Voltage .......................................6V
FB1, FB2 Voltage .........................................................6V
V
Junction Temperature ........................................... 125°C
Operating Junction Temperature Range
(Note 2) .................................................. –40°C to 125°C
Storage Temperature Range ................... –65°C to 125°C
temperature range, otherwise specifi cations are at T
LEAD FREE FINISH
LT3742EUF#PBF
Consult LTC Marketing for parts specifi ed with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based fi nish parts.
For more information on lead free part marking, go to:
For more information on tape and reel specifi cations, go to:
2
PARAMETER
Minimum Operating Input Voltage
Quiescent Current
Shutdown Current
UVLO Pin Threshold
UVLO Pin Hysteresis Current
RUN/SS Pin Threshold
RUN/SS Pin Charge Current
FB Pin Voltage
FB Pin Voltage Line Regulation
IN
C1
, V
Voltage ................................................................30V
C2
+
–
Voltage ..........................................................6V
, SENSE2
, SENSE2
+
–
Voltage ......................................30V
Voltage ......................................30V
TAPE AND REEL
LT3742EUF#TRPBF
http://www.linear.com/leadfree/
CONDITIONS
V
V
V
UVLO Pin Voltage Rising
V
V
V
PART MARKING
3742
UVLO
RUN/SS1
RUN/SS1
UVLO
RUN/SS
IN
= 5V to 30V
http://www.linear.com/tapeandreel/
A
= 25°C. V
= 1.5V
= 1V, Current Flows Into Pin
= 0V
= V
= V
The
RUN/SS2
RUN/SS2
●
IN
denotes the specifi cations which apply over the full operating
= 5V unless otherwise specifi ed.
= V
= 0V
PIN CONFIGURATION
FB1
= V
PACKAGE DESCRIPTION
24-Lead (4mm × 4mm) Plastic QFN
FB2
= 1V
EXPOSED PAD (PIN 25) IS GND, MUST BE SOLDERED TO PCB
UVLO
BIAS
SWB
V
G1
G2
IN
24-LEAD (4mm × 4mm) PLASTIC QFN
1
2
3
4
5
6
24 23 22 21 20 19
T
7
JMAX
●
●
●
8
UF PACKAGE
= 125°C, θ
TOP VIEW
9
25
0.788
MIN
1.20
10 11 12
1.8
0.2
0.5
JA
= 36°C/W
0.800
1.24
0.01
TYP
3.5
5.0
2.7
0.6
0.9
20
18
17
16
15
14
13
TEMPERATURE RANGE
–40°C to 125°C (Note 2)
V
PG1
RUN/SS1
RUN/SS2
PG2
V
C1
C2
0.812
MAX
1.28
4.0
7.0
1.5
35
4
UNITS
3742f
%/V
mA
μA
μA
μA
V
V
V
V