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LT1619 数据表(PDF) 2 Page - Linear Technology

部件名 LT1619
功能描述  Low Voltage Current Mode PWM Controller
PDF  20 Pages
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制造商  LINER [Linear Technology]
网页  http://www.linear.com
标志 LINER - Linear Technology

LT1619 数据表(HTML) 2 Page - Linear Technology

  LT1619_15 Datasheet HTML 1Page - Linear Technology LT1619_15 Datasheet HTML 2Page - Linear Technology LT1619_15 Datasheet HTML 3Page - Linear Technology LT1619_15 Datasheet HTML 4Page - Linear Technology LT1619_15 Datasheet HTML 5Page - Linear Technology LT1619_15 Datasheet HTML 6Page - Linear Technology LT1619_15 Datasheet HTML 7Page - Linear Technology LT1619_15 Datasheet HTML 8Page - Linear Technology LT1619_15 Datasheet HTML 9Page - Linear Technology Next Button
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LT1619
1619fa
Input Voltage (VIN) ................................... – 0.3V to 20V
Gate Drive Supply Voltage (DRV) ............. – 0.3V to 20V
Shutdown/Synch Voltage (S/S) ................ – 0.3V to 20V
Feedback Voltage (FB) .............................................. VIN
Compensation Voltage (VC) ...................................... 3V
Gate Drive Output Current (GATE) ........................
±1.5A
Current Sense Voltage (SENSE) ................. – 0.5V to VIN
Operating Temperature Range (Note 2) .. – 40
°C to 85°C
Junction Temperature (Note 3) ............................. 125
°C
Storage Temperature Range ................. – 65
°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300
°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
TJMAX = 125°C, θJA = 200°C/ W
TJMAX = 125°C, θJA = 120°C/ W
(Note 1)
ORDER PART
NUMBER
MS8 PART MARKING
LT1619EMS8
LTHC
1
2
3
4
S/S
FB
VC
GND
8
7
6
5
VIN
DRV
GATE
SENSE
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
ORDER PART
NUMBER
S8 PART MARKING
LT1619ES8
1619
1
2
3
4
8
7
6
5
TOP VIEW
VIN
DRV
GATE
SENSE
S/S
FB
VC
GND
S8 PACKAGE
8-LEAD PLASTIC SO
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Reference Voltage
Measured at the FB Pin
q
1.22
1.24
1.26
V
Reference Line Regulation
1.9V
≤ VIN ≤ 18V
0.004
0.05
%/V
FB Input Bias Current
VFB = VREF
10
25
nA
Error Amplifier Transconductance
80
170
260
µΩ–1
Error Amplifier Output Source Current
VFB = 1V, VCOMP = 1V
4
8.7
14
µA
Error Amplifier Output Sink Current
VFB = 1.5V, VCOMP = 1V
4
8.7
14
µA
Error Amplifier Clamp Voltage
VFB = 1V
1.6
2.2
V
Undervoltage Lockout Threshold
1.65
1.85
V
Input Voltage Range
q
1.9
18
V
Switching Frequency
1.9V
≤ VIN ≤ 18V
q
220
300
360
kHz
Synchronization Frequency Range
370
500
kHz
Maximum Duty Cycle
q
88
92
%
Current Limit Threshold
q
40
53
66
mV
Burst Mode Operation Current Limit
10
mV
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
VIN = VDRV = 2.5V, VS/S = VIN, COMP open, VSENSE = 0V unless otherwise noted.
ABSOLUTE
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
ELECTRICAL CHARACTERISTICS



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