LT1939IDD 데이터 시트보기 (PDF) - Linear Technology
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LT1939IDD Datasheet PDF : 24 Pages
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LT1939
ABSOLUTE MAXIMUM RATINGS
(Note 1)
VIN, PG, PG Operating.................................... 25V/–0.3V
SW .............................................................................VIN
BST ................................................................ 45V/–0.3V
BST Pin Above SW....................................................25V
LDRV, SHDN..............................................................15V
FB, LFB, RT/SYNC .......................................................5V
SS, VC ......................................................................2.5V
Operating Junction Temperature Range (Notes 2, 6)
LT1939EDD........................................ –40°C to 125°C
LT1939IDD......................................... –40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
PIN CONFIGURATION
TOP VIEW
VIN 1
SHDN 2
SS 3
PG 4
VC 5
RT/SYNC 6
12 SW
11 BST
13
10 LDRV
9 LFB
8 FB
7 PG
DD PACKAGE
12-LEAD (3mm × 3mm) PLASTIC DFN
θJA = 45°C/W, θJC(PAD) = 10°C/W
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT1939EDD#PBF
LT1939IDD#PBF
LT1939EDD#TRPBF
LDJZ
LT1939IDD#TRPBF
LDJZ
12-Lead (3mm × 3mm) Plastic DFN
12-Lead (3mm × 3mm) Plastic DFN
–40°C to 125°C
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TJ = 25°C. VVIN = 15V, VRT/SYNC = 2V, unless otherwise specified.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
SHDN Threshold
l 710
760
780
mV
SHDN Source Current
1.5
2.5
3.5
μA
SHDN Current Hysterisis
1.25
2
3.25
μA
Minimum Input Voltage (Note 3)
Supply Shutdown Current
Supply Quiescent Current
FB Voltage
FB Bias Current
Error Amplifier gm
Error Amplifier Source Current
Error Amplifier Sink Current
Error Amplifier High Clamp
Error Amplifier Switching Threshold
SS Source Current
VFB = 0V
VSHDN = 0V
VFB = 0.9V
VVC = 1V
VVC = 0.6V to 1.6V, VIN = 3V to 25V
VFB = 0.8V, VVC = 1V
VVC = 1V, IVC = ±10μA
VFB = 0.6V, VVC = 1V
VFB = 1V, VVC = 1V
VFB = 0.6V
VFB = 0.6V
VSHDN = 1V, VSS = 0.4V, VFB = 0.9V
l
2.4
2.8
V
l
12
30
μA
2.5
3.5
mA
l 0.784 0.8 0.816
V
l 0.776 0.8 0.824
V
50
150
nA
150
250
350 μmho
12
16
20
μA
14
18
22
μA
1.8
2.0
2.2
V
0.6
0.8
1.0
V
2.25 2.75 3.75
μA
1939f
2
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