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LTC1538CG-AUX

Part # LTC1538CG-AUX
Description IC REG CTRLR BUCK PWM CM 28-SSOP
Category IC
Availability In Stock
Qty 85
Qty Price
1 - 17 $9.35307
18 - 35 $7.43994
36 - 53 $7.01480
54 - 71 $6.51881
72 + $5.81024
Manufacturer Available Qty
Linear Technology
Date Code: 9825
  • Shipping Freelance Stock: 85
    Ships Immediately

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Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

25
LTC1538-AUX/LTC1539
APPLICATIONS INFORMATION
WUU
U
Figure 13. LTC1539 Physical Layout Diagram
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
RUN/SS1
SENSE
+
1
SENSE
–
1
V
PROG1
I
TH1
POR2
C
OSC
SGND
LBI
LBO
SFB1
I
TH2
V
PROG2
V
OSENSE2
SENSE
–
2
SENSE
+
2
RUN/SS2
AUXDR
PLL LPF
PLLIN
BOOST 1
TGL1
SW1
TGS1
V
IN
BG1
INTV
CC
PGND
BG2
EXTV
CC
TGS2
SW2
TGL2
BOOST 2
AUXON
AUXFB
LTC1539
D
B1
D
B2
M3
M1
C
IN1
C
IN2
C
OUT1
+
–
C
OUT2
R
SENSE1
R
SENSE2
C
B1
0.1µF
C
LP
0.01µF
C
C1A
1000pF
R
LP
10k
EXT 
CLOCK
C
B2
0.1µF
M2 D1
L1
L2
GROUND PLANE
D2
M5
1538 F13
M6
M4
4.7µF
+
+
+
+
+
R
C1
10k
R
C2
10k
+
–
V
OUT1
+
–
V
IN
V
OUT2
1000pF
1000pF
220pF
NOT ALL PINS CONNECTED FOR CLARITY
BOLD LINES INDICATE HIGH CURRENT PATHS
INTV
CC
INT V
CC
V
IN
100k
1000pF
C
OSC
C
C1B
220pF
C
SS
0.1µF
C
C2B
470pF
C
C2A
1000pF
C
SS
0.1µF
OUTPUT DIVIDER
REQUIRED WITH
V
PROG
OPEN
100pF
22pF
10Ω
10Ω
56pF
26
LTC1538-AUX/LTC1539
TYPICAL APPLICATIONS
U
LTC1538-AUX 5V/3A, 3.3V/3.5A, 12V/0.2A Regulator
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
BOOST1
RUN/SS1
SENSE
+
1
SENSE
–
1
V
PROG1
I
TH1
C
OSC
SGND
SFB1
I
TH2
V
OSENSE2
SENSE
–
2
SENSE
+
2
RUN/SS2
TGL1
SW1
V
IN
BG1
INTV
CC
PGND
BG2
EXTV
CC
SW2
TGL2
BOOST 2
AUXON
AUXFB
AUXDR
LTC1538-AUX
1538 TA01
100Ω
10k
10k
CMDSH-3
0.1µF
1000pF
1000pF
4.7µF 16V
10µH
SUMIDA
CDRH125-100MC
CMDSH-3
1000pF
1000pF
100Ω
56pF
220pF
1000pF
470pF
56pF
221k, 1%
392k, 1%
10Ω
10Ω
220pF
0.1µF
V
OUT1
0.1µF
0.1µF
0.1µF
+
22µF
35V
× 2
10Ω
M1A
M1B
M3
M2
MBRS140T3
MBRS140T3
+
100µF
10V, × 2
0.033Ω
T1 1: 1.8
0.033Ω
+
10µF
25V
+
100µF
10V
× 2
+
22µF
35V
× 2
+
4.7µF
47k
2N2905
R6
1M
1%
R5
90.9k
1%
V
IN
5.2V TO 28V
V
OUT1
5V/3A
GND
V
OUT2
3.3V/3.5A
V
OUT3
12V
+
1N4148
1k
1N4148
22pF
5V STANDBY
MBRS1100T3
V
IN
5.2 TO 28V: SWITCHING FREQUENCY = 200kHz
T1: DALE LPE6562-A262 GAPPED E-CORE OR BH ELECTRONICS #501-0657 GAPPED TOROID
M1A, M1B = SILICONIX Si4936DY
M2, M3 = SILICONIX Si4412DY
ALL INPUT AND OUTPUT CAPACITORS ARE AVX-TPS SERIES
27
LTC1538-AUX/LTC1539
TYPICAL APPLICATIONS
U
LTC1539 High Efficiency Low Noise 5V/20mA Standby, 5V/3A, 3.3V/3.5A and 12V/200mA Regulator
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
RUN/SS1
SENSE
+
1
SENSE
–
1
V
PROG1
I
TH1
POR2
C
OSC
SGND
LBI
LBO
SFB1
I
TH2
V
PROG2
V
OSENSE2
SENSE
–
2
SENSE
+
2
RUN/SS2
AUXDR
PLL LPF
PLLIN
BOOST 1
TGL1
SW1
TGS1
V
IN
BG1
INTV
CC
PGND
BG2
EXTV
CC
TGS2
SW2
TGL2
BOOST 2
AUXON
AUXFB
LTC1539
D2
CMDSH-3
D4
CMDSH-3
D1
MBRS140T3
T1*
1: 1.8
D3
MBRS140T3
M3
M1
0.1µF
C
LP
0.01µF
C
C1
1000pF
R
LP
10k
EXT
CLOCK
0.1µF
M2
M5
1538 TA02
M6
M4
V
OUT1
4.7µF 16V
+
R
C1
10k
R
C
10k
1000pF
1000pF
INTV
CC
100k
LBO
1000pF
C
OSC
56pF
C
C1A
220pF
C
SS1
0.1µF
C
C2
1000pF
C
SS2
0.1µF
220pF
C
C2A
470pF
100pF
390k, 1%
110k, 1%
100k
POR2
D7
MBRS1100T3
R
SENSE1
0.03Ω
+
10µF
25V
+
C
OUT2
220µF
10V
+
C
OUT1
220µF
10V
V
OUT1
5V/3A
R
SENSE2
0.03Ω
V
OUT2
3.3V
3.5A
L2
10µH
+
C
IN2
22µF
35V
× 2
47k
R6
1M
1%
R5
90.9k
1%
+
4.7µF
25V
Q1
MMBT
2907
V
OUT2
12V
200mA
V
IN
6V TO 28V
*T1 = DALE LPE6562-A262 OR BH ELECTRONICS #501-0657
M1, M2, M4, M5 = IRF7403
M3, M6 = IRLML2803
L2 = SUMIDA CDRH125-100MC
ALL INPUT CAPACITORS ARE AVX-TPS SERIES
ALL OUTPUT CAPACITORS ARE AVX-TPSV LEVEL II SERIES
+
CIN1
22µF
35V
× 2
5V
STANDBY
D6
1N4148
1k
D5
1N4148
10Ω
10Ω
100Ω 100Ω
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