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LT1302 Datasheet(PDF) 2 Page - Linear Technology

No. de pieza LT1302
Descripción Electrónicos  Micropower High Output Current Step-Up Adjustable and Fixed 5V DC/DC Converters
PDF  16 Pages
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Fabricante Electrónico  LINER [Linear Technology]
Página de inicio  http://www.linear.com
Logo LINER - Linear Technology

LT1302 Datasheet(HTML) 2 Page - Linear Technology

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LT1302/LT1302-5
A
G
A
U
A
R
BSOLUTEXI
TI
S
PACKAGE/ORDER I FOR ATIO
VIN Voltage ............................................................. 10V
SW Voltage ............................................................. 25V
FB Voltage .............................................................. 10V
SHDN Voltage ......................................................... 10V
VC Voltage ................................................................ 4V
IT 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
Consult factory for Industrial and Military grade parts.
ORDER PART
NUMBER
LT1302CN8
LT1302CS8
LT1302CN8-5
LT1302CS8-5
S8 PART MARKING
1302
13025
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IQ
Quiescent Current
VSHDN = 0.5V, VFB = 1.3V
q
200
300
µA
VSHDN = 1.8V
q
15
25
µA
VIN
Input Voltage Range
2.0
V
q
2.2
8
V
VFB
Feedback Voltage (LT1302)
VC = 0.4V
q
1.22
1.24
1.26
V
Feedback Pin Bias Current (LT1302)
VFB = 1V
100
nA
Output Sense Voltage (LT1302-5)
VC = 0.4V
q
4.85
5.05
5.25
V
Output Ripple Voltage (LT1302-5)
VC = 0.4V
50
mV
Sense Pin Resistance to Ground (LT1302-5)
420
k
Ω
VOS
Offset Voltage
See Block Diagram
15
mV
Comparator Hysteresis
(Note 1)
5
mV
Oscillator Frequency
Current Limit Not Asserted (Note 2)
175
220
265
kHz
q
160
310
kHZ
DC
Maximum Duty Cycle
75
86
95
%
tON
Switch On Time
Current Limit Not Asserted
3.9
µs
tOFF
Switch Off Time
0.7
µs
Output Line Regulation
2 < VIN < 8V
q
0.06
0.15
%/V
VCESAT
Switch Saturation Voltage
ISW = 2A
310
400
mV
q
475
mV
Switch Leakage Current
VSW = 5V, Switch Off
q
0.1
10
µA
Switch Current Limit
VC = 0.4V (Burst Mode Operation)
1
A
VC = 1.25V (Full Power) (Note 3)
q
2.0
2.8
3.9
A
Error Amplifier Voltage Gain
0.9V
≤ VC ≤ 1.2V, ∆VC/∆VFB
50
75
V/ V
VSHDNH
Shutdown Pin High
q
1.8
V
VSHDNL
Shutdown Pin Low
q
0.5
V
ISHDN
Shutdown Pin Bias Current
VSHDN = 5V
q
820
µA
VSHDN = 2V
3
µA
VSHDN = 0V
q
0.1
1
µA
IT Pin Resistance to Ground
3.9
k
Ω
TA = 25°C, VIN = 2.5V, unless otherwise noted.
ELECTRICAL C
C
HARA TERISTICS
C
D
The q 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
VC
SHDN
(SENSE*)FB
PGND
SW
VIN
IT
N8 PACKAGE
8-LEAD PDIP
S8 PACKAGE
8-LEAD PLASTIC SO
*FIXED VERSION
PINS 1 AND 8 ARE INTERNALLY
CONNECTED IN SOIC PACKAGE
TJMAX = 125°C, θJA = 100°C/W (N8)
TJMAX = 125°C, θJA = 80°C/W (S8)



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