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LT1976HFE 数据表(PDF) 2 Page - Linear Technology

部件名 LT1976HFE
功能描述  High Voltage 1.5A, 200kHz Step-Down Switching Regulator with 100關A Quiescent Current
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LT1976HFE 数据表(HTML) 2 Page - Linear Technology

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background image
LT1976/LT1976B
2
1976bfg
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF
Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
(Note 1)
VIN, SHDN, PG, BIAS .............................................. 60V
BOOST Pin Above SW ............................................ 35V
BOOST Pin Voltage ................................................. 68V
SYNC, CSS, PGFB, FB ................................................ 6V
Operating JunctionTemperature Range
LT1976EFE/LT1976BEFE (Note 2) ... – 40
°C to 125°C
LT1976IFE/LT1976BIFE (Note 2) ..... – 40
°C to 125°C
LT1976HFE (Note 2) ........................ – 40
°C to 140°C
Storage Temperature Range ................. – 65
°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300
°C
ORDER PART
NUMBER
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LT1976EFE
LT1976IFE
LT1976HFE
LT1976BEFE
LT1976BIFE
ABSOLUTE
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
ELECTRICAL CHARACTERISTICS The denotes the specifications which apply over the full –40°C to 125°C
operating temperature range, otherwise specifications are at TJ = 25
°C. VIN = 12V, SHDN = 12V, BOOST = 15.3V, BIAS = 5V,
FB/PGFB = 1.25V, CSS/SYNC = 0V unless otherwise noted.
θJA = 45°C/W, θJC(PAD) = 10°C/W
EXPOSED PAD IS GND (PIN 17)
MUST BE SOLDERED TO GND (PIN 8)
FE PACKAGE
16-LEAD PLASTIC TSSOP
1
2
3
4
5
6
7
8
TOP VIEW
16
15
14
13
12
11
10
9
NC
SW
NC
VIN
NC
BOOST
CT
GND
PG
SHDN
SYNC
PGFB
FB
VC
BIAS
CSS
17
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VSHDN
SHDN Threshold
1.2
1.3
1.4
V
ISHDN
SHDN Input Current
SHDN = 12V
520
μA
Minimum Input Voltage (Note 3)
2.4
3
V
IVINS
Supply Shutdown Current
SHDN = 0V, BOOST = 0V, FB/PGFB = 0V
0.1
2
μA
Supply Sleep Current (Note 4) (LT1976)
BIAS = 0V, FB = 1.35V
170
230
μA
FB = 1.35V
45
75
μA
IVIN
Supply Quiescent Current
BIAS = 0V, FB = 1.15V, VC = 0.8V (VC = 0V LT1976B)
3.2
4.10
mA
BIAS = 5V, FB = 1.15V, VC = 0.8V (VC = 0V LT1976B)
2.6
3.25
mA
Minimum BIAS Voltage (Note 5)
2.7
3
V
IBIASS
BIAS Sleep Current (Note 4) (LT1976)
110
180
μA
IBIAS
BIAS Quiescent Current
SYNC = 3.3V
700
800
μA
Minimum Boost Voltage (Note 6)
ISW = 1.5A
1.8
2.5
V
Input Boost Current (Note 7)
ISW = 1.5A
40
50
mA
VREF
Reference Voltage (VREF)
3.3V < VVIN < 60V
1.225
1.25
1.275
V
IFB
FB Input Bias Current
75
200
nA
EA Voltage Gain (Note 8)
900
V/V
EA Voltage gm
dI(VC)= ±10μA
400
650
800
μMho
EA Source Current
FB = 1.15V
20
40
55
μA
EA Sink Current
FB = 1.35V
15
30
40
μA
VC to SW gm
3A/V
VC High Clamp
2.1
2.2
2.4
V
VC Switching Threshold (LT1976B)
0.1
0.4
0.8
V
FE PART MARKING
1976EFE
1976IFE
1976HFE
1976BEFE
1976BIFE


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