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LT1269 データシート(PDF) 2 Page - Linear Technology

部品番号 LT1269
部品情報  4A High Efficiency Switching Regulators
PDF  8 Pages
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メーカー  LINER [Linear Technology]
ホームページ  http://www.linear.com
Logo LINER - Linear Technology

LT1269 データシート(HTML) 2 Page - Linear Technology

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2
LT1271/LT1269
A
G
A
U
A
R
BSOLUTEXI
TI
S
Operating Junction Temperature Range
Operating .............................................. 0
°C to 100°C
Short Circuit ......................................... 0
°C to 125°C
Lead Temperature (Soldering, 10 sec.)................ 300
°C
Supply Voltage ....................................................... 30V
Switch Output Voltage ............................................ 60V
Feedback Pin Voltage (Transient, 1ms) ................
±15V
Storage Temperature Range ................ – 65
°C to 150°C
PACKAGE/ORDER I FOR ATIO
ORDER PART
NUMBER
VIN
VSW
GND
FB
VC
T PACKAGE
5-LEAD PLASTIC TO-220
FRONT VIEW
5
4
3
2
1
TJ MAX = 100°C, θJC = 4°C/W, θJA = 50°C/W
Q PACKAGE
5-LEAD PLASTIC DD
FRONT VIEW
VIN
VSW
GND
FB
VC
5
4
3
2
1
TJ MAX = 100°C, θJC = 4°C/W, θJA = 30°C/W*
LT1271CQ
LT1269CQ
ORDER PART
NUMBER
LT1271CT
LT1269CT
ORDER PART
NUMBER
LT1269CS
θ WILL VARY FROM APPROXIMATELY 40°C/W
WITH 0.75 SQ. IN. OF 1 OZ. COPPER TO 46
°C/W
WITH 0.33 SQ. IN. OF 1 OZ. COPPER
1
2
3
4
5
6
7
8
9
10
TOP VIEW
SW PACKAGE
20-LEAD PLASTIC WIDE SO
20
19
18
17
16
15
14
13
12
11
VSW
VSW
NC
GND
GND
GND
GND
AGND
VC
FB
VSW
VSW
NC
GND
GND
GND
GND
VIN
NC
NC
POWER
SWITCH
POWER
SWITCH
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
VREF
Reference Voltage
Measured at Feedback Pin
1.224
1.244
1.264
V
VC = 0.8V
q
1.214
1.244
1.274
V
IB
Feedback Input Current
VFB = VREF
350
750
nA
q
1100
nA
gm
Error Amplifier
∆IC = ±25µA
3000
4400
6000
µmho
Transconductance
q
2400
7000
µmho
Error Amplifier Source or
VC = 1.5V
150
200
350
µA
Sink Current
q
120
400
µA
Error Amplifier Clamp
Hi Clamp, VFB = 1V
1.8
2.3
V
Voltage
Lo Clamp, VFB = 1.5V
0.25
0.38
0.52
V
Reference Voltage Line
3V
≤ VIN ≤ VMAX, VC = 0.8V
q
0.03
%/V
Regulation
AV
Error Amplifier Voltage Gain
0.9V
≤ VC ≤ 1.4V
500
800
V/V
Minimum Input Voltage (Note 3)
q
2.8
3.0
V
IQ
Supply Current
3V
≤ VIN ≤ VMAX, VC = 0.6V
7
10
mA
VIN = 15V, VC = 0.5V, VFB = VREF, switch pin open, unless otherwise noted.
ELECTRICAL C
C
HARA TERISTICS
*With device soldered to 1/2 square inch of 1oz copper over backside or internal layer
ground plane. Consult factory for Industrial and Military grade parts.



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