LT3436EFE Просмотр технического описания (PDF) - Linear Technology
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LT3436EFE Datasheet PDF : 16 Pages
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LT3436
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Voltage .......................................................... 25V
Switch Voltage ......................................................... 35V
SHDN Pin ............................................................... 25V
FB Pin Current ....................................................... 1mA
SYNC Pin Current .................................................. 1mA
Operating Junction Temperature Range (Note 2)
LT3436E .......................................... – 40°C to 125°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
PACKAGE/ORDER INFORMATION
GND 1
VIN 2
SW 3
SW 4
GND 5
GND 6
NC 7
GND 8
TOP VIEW
16 GND
15 NC
14 SYNC
17
13 VC
12 FB
11 SHDN
10 NC
9 GND
FE PACKAGE
16-LEAD PLASTIC TSSOP
EXPOSED PAD IS GND (PIN 17),
MUST BE SOLDERED TO PCB
TJMAX = 125°C, θJA = 45°C/W,
θJC(PAD) = 10°C/W
ORDER PART NUMBER
LT3436EFE
FE PART MARKING
3436EFE
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The●denotesthespecificationswhichapplyoverthefulloperatingtemperature
range, otherwise specifications are at TA = 25°C. VIN = 15V, VC = 0.8V, SHDN, SYNC and switch open unless otherwise noted.
PARAMETER
CONDITION
MIN TYP MAX UNITS
Recommended Operating Voltage
●3
25
V
Maximum Switch Current Limit
●3
4
6
A
Oscillator Frequency
Switch On Voltage Drop
VIN Undervoltage Lockout
3.3V < VIN < 25V
ISW = 3A
(Note 3)
● 640
800
960
kHz
●
330 550
mV
● 2.47
2.6
2.73
V
VIN Supply Current
ISW = 0A
●
1
1.3
mA
VIN Supply Current/ISW
ISW = 3A
15
mA/A
Shutdown Supply Current
VSHDN = 0V, VIN = 25V, VSW = 25V
11
25
µA
●
45
µA
Feedback Voltage
3V < VIN < 25V, 0.4V < VC < 0.9V
1.182 1.2 1.218
V
● 1.176
1.224
V
FB Input Current
●0
– 0.2 – 0.4
µA
FB to VC Voltage Gain
FB to VC Transconductance
VC Pin Source Current
0.4V < VC < 0.9V
∆IVC = ±10µA
VFB = 1V
150
● 500
● – 85
350
850
– 120
1300
– 165
µMho
µA
VC Pin Sink Current
VFB = 1.4V
● 70
110 165
µA
VC Pin to Switch Current Transconductance
4.8
A/V
VC Pin Minimum Switching Threshold
Duty Cycle = 0%
0.3
V
VC Pin 3A ISW Threshold
0.9
V
Maximum Switch Duty Cycle
VC = 1.2V, ISW = 350mA
VC = 1.2V, ISW = 1A
85
90
%
● 80
%
SHDN Threshold Voltage
● 1.28 1.35 1.42
V
SHDN Input Current (Shutting Down)
SHDN = 60mV Above Threshold
● –7
–10 –13
µA
SHDN Threshold Current Hysteresis
SHDN = 100mV Below Threshold
4
7
10
µA
SYNC Threshold Voltage
1.5
2.2
V
SYNC Input Frequency
1
1.4
MHz
SYNC Pin Resistance
ISYNC = 1mA
20
kΩ
3436fa
2
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