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參數(shù)資料
| 型號： | LT1302- 5 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | Micropower High Output Current Step-Up Fixed 5V DC/DC Converters(微功耗,高輸出電流,5V固定輸出電壓,步升DC/DC變換器) |
| 中文描述： | 微高輸出電流升壓型固定5V直流/直流轉換器（微功耗，高輸出電流，5V的固定輸出電壓，步升直流/直流變換器） |
| 文件頁數(shù)： | 2/16頁 |
| 文件大小： | 313K |
| 代理商： | LT1302- 5 |
2
LT1302/LT1302-5
A
V
IN
Voltage ............................................................. 10V
SW Voltage............................................................. 25V
FB Voltage .............................................................. 10V
SHDN Voltage......................................................... 10V
V
C
Voltage ................................................................ 4V
I
T
Voltage.................................................................. 4V
Maximum Power Dissipation............................ 700mW
Operating Temperature Range.................... 0
°
C to 70
°
C
Storage Temperature Range............... –65
°
C to 150
°
C
Lead Temperature (Soldering, 10 sec)................. 300
°
C
U
G
W
A
W
U
W
A
R
BSOLUTE
XI
TI
S
U
PACKAGE/ORDER U
Consult factory for Industrial and Military grade parts.
ORDER PART
NUMBER
LT1302CN8
LT1302CS8
LT1302CN8-5
LT1302CS8-5
S8 PART MARKING
1302
13025
SYMBOL
I
Q
PARAMETER
Quiescent Current
CONDITIONS
V
SHDN
= 0.5V, V
FB
= 1.3V
V
SHDN
= 1.8V
MIN
TYP
200
15
MAX
300
25
UNITS
G
G
μ
A
μ
A
V
V
V
nA
V
mV
k
mV
mV
kHz
kHZ
%
μ
s
μ
s
%/V
mV
mV
μ
A
V
IN
Input Voltage Range
2.0
2.2
1.22
G
8
V
FB
Feedback Voltage (LT1302)
Feedback Pin Bias Current (LT1302)
Output Sense Voltage (LT1302-5)
Output Ripple Voltage (LT1302-5)
Sense Pin Resistance to Ground (LT1302-5)
Offset Voltage
Comparator Hysteresis
Oscillator Frequency
V
C
= 0.4V
V
FB
= 1V
V
C
= 0.4V
V
C
= 0.4V
G
1.24
100
5.05
50
420
15
5
220
1.26
G
4.85
5.25
V
OS
See Block Diagram
(Note 1)
Current Limit Not Asserted (Note 2)
175
160
75
265
310
95
G
DC
t
ON
t
OFF
Maximum Duty Cycle
Switch On Time
Switch Off Time
Output Line Regulation
Switch Saturation Voltage
86
3.9
0.7
0.06
310
Current Limit Not Asserted
2 < V
IN
< 8V
I
SW
= 2A
G
0.15
400
475
10
V
CESAT
G
Switch Leakage Current
Switch Current Limit
V
SW
= 5V, Switch Off
V
C
= 0.4V (Burst Mode Operation)
V
C
= 1.25V (Full Power) (Note 3)
0.9V
≤
V
C
≤
1.2V,
V
C
/
V
FB
G
0.1
1
2.8
75
A
A
G
2.0
50
1.8
3.9
Error Amplifier Voltage Gain
Shutdown Pin High
Shutdown Pin Low
Shutdown Pin Bias Current
V/V
V
SHDNH
V
SHDNL
I
SHDN
G
V
V
G
0.5
20
V
SHDN
= 5V
V
SHDN
= 2V
V
SHDN
= 0V
G
8
3
μ
A
μ
A
μ
A
k
G
0.1
3.9
1
I
T
Pin Resistance to Ground
T
A
= 25
°
C, V
IN
= 2.5V, unless otherwise noted.
ELECTRICAL C
HARA TERISTICS
C
D
The
G
denotes specifications which apply over the 0
°
C to 70
°
C
temperature range.
Note 1:
Hysteresis is specified at DC. Output ripple depends on capacitor
size and ESR.
Note 2:
The LT1302 operates in a variable frequency mode. Switching
frequency depends on load inductance and operating conditions and may
be above specified limits.
Note 3:
Minimum switch current 100% tested. Maximum switch current
guaranteed by design.
1
2
3
4
8
7
6
5
TOP VIEW
GND
V
C
SHDN
(SENSE*)FB
PGND
SW
V
IN
I
T
N8 PACKAGE
8-LEAD PDIP
S8
8-LEAD PLASTIC SO
*FIXED VERSION
PINS 1 AND 8 ARE INTERNALLY
CONNECTED IN SOIC PACKAGE
T
JMAX
= 125
°
C,
θ
JA
= 100
°
C/W (N8)
T
JMAX
= 125
°
C,
θ
JA
= 80
°
C/W (S8)
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