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LT1269CSW#PBF

P1-P3P4-P6P7-P8
4
LT1271/LT1269
CCHARA TERIST
ICS
UW
AT
Y
P
I
CA
LPER
F
O
R
C
E
Switch Current Limit vs Duty Cycle Switch Saturation Voltage
DUTY CYCLE (%)
0
SWITCH CURRENT (A)
9
12
40
1271/69 G01
6
3
0
10
20
30
50
60 70
80
90 100
–55°C
125°C
25°C
SWITCH CURRENT (A)
0
0.4
SWITCH SATURATION VOLTAGE (V)
0.6
0.8
1.0
1.2
1.4
1.6
1
234
1271/69 G02
5
0.2
0
T
J
= 25°C
U
SA
O
PP
L
IC
AT
ITY
P
I
CA
L
C1
0.22µF
L1**
100µH
D1
MBR340
1271/69 TA04
LT1271
V
SW
FB
GND
V
IN
V
C
C2
200µF
* REQUIRED IF INPUT LEADS ≥ 2"
** COILTRONICS CTX100-2-52
×
×
R1
11.3k
Q1
2N3906
OPTIONAL
OUTPUT
FILTER
L2
C3
R3
2.2k
V
IN
–12V
V
OUT
12V, 1.5A
C4*
200µF
OPTIONAL
INTPUT
FILTER
L3
R2
1.24k
+
+
Negative-to-Positive Buck-Boost Converter
5
LT1271/LT1269
U
SA
O
PP
L
IC
AT
ITY
P
I
CA
L
Boost Converter (5V to 12V)
1µF
100µH*
MBR330
10.7k
1271/69 TA03
5V
12V
0.5A
LT1271
V
SW
FB
GND
V
IN
V
C
1.24k
100µF
25V
1k
* COILTRONICS CTX100-2-52
+
U
PACKAGE
D
E
SC
R
I
PTI
O
Dimensions in inches (millimeters) unless otherwise noted.
Q Package
5-Lead Plastic DD Pak
(LTC DWG # 05-08-1461)
Q(DD5) 0396
0.028 – 0.038
(0.711 – 0.965)
0.143
+0.012
–0.020
()
3.632
+0.305
–0.508
0.057 – 0.077
(1.447 – 1.955)
0.013 – 0.023
(0.330 – 0.584)
0.095 – 0.115
(2.413 – 2.921)
0.004
+0.008
–0.004
()
0.102
+0.203
–0.102
0.050 ± 0.012
(1.270 ± 0.305)
0.059
(1.499)
TYP
0.045 – 0.055
(1.143 – 1.397)
0.165 – 0.180
(4.191 – 4.572)
0.330 – 0.370
(8.382 – 9.398)
0.060
(1.524)
TYP
0.390 – 0.415
(9.906 – 10.541)
15° TYP
0.300
(7.620)
0.075
(1.905)
0.183
(4.648)
0.060
(1.524)
0.060
(1.524)
0.256
(6.502)
BOTTOM VIEW OF DD PAK
HATCHED AREA IS SOLDER PLATED
COPPER HEAT SINK
6
LT1271/LT1269
U
PACKAGE
D
E
SC
R
I
PTI
O
Dimensions in inches (millimeters) unless otherwise noted.
T Package
5-Lead Plastic TO-220 (Standard)
(LTC DWG # 05-08-1421)
T5 (TO-220) 0398
0.028 – 0.038
(0.711 – 0.965)
0.057 – 0.077
(1.448 – 1.956)
0.135 – 0.165
(3.429 – 4.191)
0.700 – 0.728
(17.78 – 18.491)
0.045 – 0.055
(1.143 – 1.397)
0.095 – 0.115 
(2.413 – 2.921)
0.013 – 0.023
(0.330 – 0.584)
0.620
(15.75)
TYP
0.155 – 0.195
(3.937 – 4.953)
0.152 – 0.202
(3.861 – 5.131)
0.260 – 0.320
(6.60 – 8.13)
0.165 – 0.180
(4.191 – 4.572)
0.147 – 0.155
(3.734 – 3.937)
DIA
0.390 – 0.415
(9.906 – 10.541)
0.330 – 0.370
(8.382 – 9.398)
0.460 – 0.500
(11.684 – 12.700)
0.570 – 0.620
(14.478 – 15.748)
0.230 – 0.270
(5.842 – 6.858)
P1-P3P4-P6P7-P8

LT1269CSW#PBF

Mfr. #:
Buy LT1269CSW#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators 4A Hi Eff Sw Regs
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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