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參數(shù)資料
| 型號： | LT3494EDDB |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.25 A SWITCHING REGULATOR, PDSO8 |
| 封裝： | 3 X 2 MM, PLASTIC, MO-229WECD-1, DFN-8 |
| 文件頁數(shù)： | 5/12頁 |
| 文件大小： | 261K |
| 代理商： | LT3494EDDB |
LT3494/LT3494A
2
3494fb
ELECTRICAL CHARACTERISTICS
PACKAGE/ORDER INFORMATION
ABSOLUTE MAXIMUM RATINGS
VCC Voltage ...............................................................16V
SW Voltage ...............................................................40V
CAP Voltage ..............................................................40V
VOUT Voltage .............................................................40V
SHDN Voltage ...........................................................16V
CTRL Voltage ............................................................16V
FB Voltage................................................................2.5V
Maximum Junction Temperature .......................... 125°C
Operating Temperature Range (Note 2) ... –40°C to 85°C
Storage Temperature Range................... –65°C to 125°C
(Note 1)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum Operating Voltage
2.3
2.5
V
Maximum Operating Voltage
16
V
Feedback Voltage
VCTRL = 3V (Note 3)
●
1.205
1.225
1.245
V
FB Resistor
●
179
182
184
k
Ω
Quiescent Current
Not Switching
65
75
μA
Quiescent Current in Shutdown
VSHDN = 0V, VCC = 3V
0
1
μA
Minimum Switch Off Time
After Start-Up Mode, VFB = 1V, VCTRL = 3V (Note 4)
During Start-Up Mode, VFB = 0.2V, VCTRL = 3V (Note 4)
100
450
ns
Maximum Switch Off Time
VFB = 1.5V
●
15
20
30
μs
Switch Current Limit
LT3494A (Note 5)
LT3494 (Note 5)
225
115
350
180
450
250
mA
Switch VCESAT
LT3494A, ISW = 200mA
LT3494, ISW = 100mA
180
110
mV
Switch Leakage Current
VSW = 5V, VSHDN = 0
0.01
1
μA
Schottky Forward Voltage
IDIODE = 100mA
900
1100
mV
Schottky Reverse Leakage
0.05
1
μA
PMOS Disconnect VCAP – VOUT
IOUT = 10mA, VCAP = 5V
250
mV
SHDN Input Voltage High
1.5
V
SHDN Input Voltage Low
0.3
V
SHDN Pin Bias Current
VSHDN = 3V
VSHDN = 0V
5
0
10
0.1
μA
TOP VIEW
9
DDB PACKAGE
8-LEAD (3mm
× 2mm) PLASTIC DFN
5
6
7
8
4
3
2
1
SW
GND
VCC
CTRL
CAP
VOUT
FB
SHDN
TJMAX = 125°C, θJA = 76°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
ORDER PART NUMBER
DDB PART MARKING
LT3494EDDB
LT3494AEDDB
LCCD
LCRW
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/
Consult LTC Marketing for parts specied with wider operating temperature ranges.
The
● denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. VCC = 3V, VSHDN = VCC, unless otherwise noted. (Note 2)
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