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参数资料
型号： LT1576IS8#TR
厂商： LINEAR TECHNOLOGY CORP
元件分类： 稳压器
英文描述： 3.5 A SWITCHING REGULATOR, 240 kHz SWITCHING FREQ-MAX, PDSO8
封装： 0.150 INCH, PLASTIC, SOP-8
文件页数： 12/28页
文件大小： 290K
代理商： LT1576IS8#TR
2
LT1576/LT1576-5
ABSOLUTE MAXIMUM RATINGS
W
WW
U
PACKAGE/ORDER INFORMATION
W
U
(Note 1)
Input Voltage .......................................................... 25V
BOOST Pin Above Input Voltage ............................. 10V
SHDN Pin Voltage .................................................. 6.5V
BIAS Pin Voltage ...................................................... 7V
FB Pin Voltage (Adjustable Part) ............................ 3.5V
FB Pin Current (Adjustable Part) ............................ 1mA
SYNC Pin Voltage ..................................................... 7V
Operating Junction Temperature Range
LT1576C ............................................... 0
°C to 125° C
LT1576I ........................................... – 40
°C to 125°C
Storage Temperature Range ................ – 65
°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300
°C
ORDER PART NUMBER
LT1576CS8
LT1576CS8-SYNC
LT1576IS8
LT1576IS8-SYNC
LT1576CS8-5
LT1576CS8-5 SYNC
LT1576IS8-5
LT1576IS8-5 SYNC
S8 PART MARKING
1576
1576SN
1576I
576ISN
*Default is the adjustable output voltage device with FB pin and shutdown
function. Option -5 replaces FB with SENSE pin for fixed 5V output
applications. -SYNC replaces SHDN with SYNC pin for applications
requiring synchronization. Consult factory for Military grade parts.
1
2
3
4
8
7
6
5
TOP VIEW
S8 PACKAGE
8-LEAD PLASTIC SO
VSW
VIN
BOOST
GND
FB OR SENSE*
VC
BIAS
SHDN OR
SYNC*
θJA =80°C/ W WITH FUSED GROUND PIN
CONNECTED TO GROUND PLANE OR
LARGE LANDS
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Feedback Voltage
1.195
1.21
1.225
V
5V
≤ VIN ≤ 25V, VOL + 0.2V ≤ VCC ≤ VOH – 0.2V
q
1.18
1.24
V
Sense Voltage (Fixed 5V)
4.94
5.0
5.06
V
All Conditions
q
4.90
5.10
V
SENSE Pin Resistance
13
18.5
26
k
Reference Voltage Line Regulation
5V
≤ VIN ≤ 25V
0.01
0.03
%/V
Feedback Input Bias Current
q
0.5
2
A
Error Amplifier Voltage Gain
(Notes 2, 8)
200
400
Error Amplifier Transconductance
I (VC) = ±10A (Note 8)
800
1050
1300
Mho
q
400
1700
Mho
VC Pin to Switch Current Transconductance
1.5
A/ V
Error Amplifier Source Current
VFB = 1V
q
40
110
190
A
Error Amplifier Sink Current
VFB = 1.4V
q
50
130
200
A
VC Pin Switching Threshold
Duty Cycle = 0
0.8
V
VC Pin High Clamp
2.1
V
Switch Current Limit
VC Open, VFB = 1.1V, DC ≤ 50%
q
1.5
2
3.50
A
Slope Compensation (Note 9)
DC = 80%
0.3
A
Switch On Resistance (Note 7)
ISW = 1.5A
0.2
0.35
q
0.45
Maximum Switch Duty Cycle
VFB = 1.1V
90
94
%
q
86
94
%
ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating temperature
range, otherwise specifications are TA, TJ = 25°C, VIN = 15V, VC = 1.5V, Boost = VIN + 5V, switch open, unless otherwise noted.
15765
5765SN
1576I5
76I5SN
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