3433EFE 데이터 시트보기 (PDF) - Linear Technology
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3433EFE Datasheet PDF : 16 Pages
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LT3433
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Supply (VIN) .................................... –0.3V to 60V
Boosted Supply (VBST) .............. –0.3V to VSW_H + 30V
(VBST(MAX) = 80V)
Internal Supply (VBIAS) ............................. – 0.3V to 30V
SW_H Switch Voltage .................................. – 2V to 60V
SW_L Switch Voltage ............................... – 0.3V to 30V
Feedback Voltage (VFB) ............................... – 0.3V to 5V
Burst Enable Pin (VBURST_EN) ................... – 0.3V to 30V
Shutdown Pin (VSHDN) ............................. – 0.3V to 60V
Operating Junction Temperature Range (Note 5)
LT3433E (Note 6) ............................ – 40°C to 125°C
LT3433I ........................................... – 40°C to 125°C
Storage Temperature Range ................ – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
PACKAGE/ORDER INFORMATION
TOP VIEW
SGND 1
VBST 2
SW_H 3
VIN 4
BURST_EN 5
VC 6
VFB 7
SGND 8
16 SGND
15 SW_L
14 PWRGND
17
13 VOUT
12 VBIAS
11 SHDN
10 SS
9 SGND
FE PACKAGE
16-LEAD PLASTIC TSSOP
TJMAX = 125°C, θJA = 40°C/W, θJC = 10°C/W
EXPOSED PAD (PIN 17)
MUST BE SOLDERED TO SGND
ORDER PART
NUMBER
LT3433EFE
LT3433IFE
FE PART MARKING
3433EFE
3433IFE
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
The q denotes specifications that apply over the full operating temperature range, otherwise specifications are at TA = 25°C.
VIN = 13.8V, VFB = 1.25V, VOUT = 5V, VBURST_EN = 0V, VBST – VIN = 5V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
VIN
VIN(UVLO)
Operating Voltage Range
Undervoltage Lockout
Undervoltage Lockout Hysteresis
Enable Threshold
q4
q
60
3.4 3.95
160
VOUT
VBST
IVIN
VBIAS
Operating Voltage Range
Operating Voltage Range
Normal Operation
Burst Mode Operation
Shutdown
Internal Supply Output Voltage
Operating Voltage Range
VBST < VSW_H + 20V
VBST – VSW_H
(Notes 2, 3)
VVC < 0.6V
VSHDN < 0.4V
q 3.3
20
q
75
q 3.3
20
q
580 940
q
100 190
q
10
25
q
2.6
2.9
q
20
IVBIAS
Normal Operation
Burst Mode Operation
Shutdown
Short-Circuit Current Limit
VVC < 0.6V
VSHDN < 0.4V
q
660 990
0.1
0.1
4.5
RSWH(ON)
RSWL(ON)
VSHDN
Boost Supply Switch On-Resistance
Output Supply Switch On-Resistance
Shutdown Pin Thresholds
ISW = 500mA
ISW = 500mA
Disable
Enable
q
0.8
1.2
q
0.6
1
q 0.4
q
1
IVBST/ISW
IVOUT/ISW
ILIM
ISS
Boost Supply Switch Drive Current
Output Supply Switch Drive Current
Switch Current Limit
Foldback Current Limit
Soft-Start Output Current
High Side Switch On, ISW = 500mA
Low Side Switch On, ISW = 500mA
VFB = 0V
q
30
50
q
30
50
q 0.5
0.7
0.9
0.35
q3
5
9
UNITS
V
V
mV
V
V
V
µA
µA
µA
V
V
µA
µA
µA
mA
Ω
Ω
V
V
mA/A
mA/A
A
A
µA
3433f
2
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