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參數(shù)資料
| 型號： | LTC1938IDD#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 4 A SWITCHING REGULATOR, 3300 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 3 X 3 MM, LEAD FREE, PLASTIC, MO-229WEED-2, DFN-10 |
| 文件頁數(shù)： | 12/24頁 |
| 文件大?。?/td> | 272K |
| 代理商： | LTC1938IDD#TRPBF |
LT1938
2
1938f
ELECTRICAL CHARACTERISTICS
VIN, RUN/SS Voltage.................................................25V
BOOST Pin Voltage ...................................................50V
BOOST Pin Above SW Pin.........................................25V
FB, RT, VC Voltage.......................................................5V
BIAS, PG, BD Voltage................................................25V
Operating Junction Temperature Range (Note 2)
LT1938E............................................. –40°C to 125°C
LT1938I ............................................. –40°C to 125°C
Storage Temperature Range................... –65°C to 150°C
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Minimum Input Voltage
●
33.6
V
Quiescent Current from VIN
VRUN/SS = 0.2V
0.01
0.5
μA
VBIAS = 3V, Not Switching
●
0.4
0.8
mA
VBIAS = 0, Not Switching
1.2
2.0
mA
Quiescent Current from BIAS
VRUN/SS = 0.2V
0.01
0.5
μA
VBIAS = 3V, Not Switching
●
0.85
1.5
mA
VBIAS = 0, Not Switching
00.1
mA
Minimum Bias Voltage
2.7
3
V
Feedback Voltage
●
1.25
1.24
1.265
1.28
1.29
V
FB Pin Bias Current (Note 3)
●
30
100
nA
FB Voltage Line Regulation
4V < VIN < 25V
0.002
0.02
%/V
The
● denotes the specications which apply over the full operating
temperature range, otherwise specications are at TA = 25°C. VIN = 10V, VRUN/SS = 10V, VBOOST = 15V, VBIAS = 3.3V unless otherwise
noted. (Note 2)
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PIN CONFIGURATION
TOP VIEW
DD PACKAGE
10-LEAD (3mm
× 3mm) PLASTIC DFN
10
9
6
7
8
4
5
3
11
2
1
RT
VC
FB
BIAS
PG
BD
BOOST
SW
VIN
RUN/SS
TJMAX = 125°C, θJA = 45°C/W, θJC = 10°C/W
EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LT1938EDD#PBF
LTC1938EDD#TRPBF
LDFT
10-Lead (3mm
× 3mm) Plastic DFN
–40°C to 125°C
LT1938IDD#PBF
LTC1938IDD#TRPBF
LDFT
10-Lead (3mm
× 3mm) Plastic DFN
–40°C to 125°C
Consult LTC Marketing for parts specied with wider operating temperature ranges. *The temperature grade is identied by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based nish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specications, go to: http://www.linear.com/tapeandreel/
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