LTC1142(RevC) 查看數據表（PDF） - Linear Technology
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LTC1142 Datasheet PDF : 20 Pages
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LTC1142/LTC1142L/LTC1142HV
TYPICAL APPLICATIONS N
VIN
6.5V TO
14V
22µF
25V
×2
VOUT3
3.3V/2A
RSENSE3
0.05Ω
L1
33µH
D1
MBRS140T3
100µF
10V
×2
1µF
P-CH
Si9430DY
24
VIN3
23
PDRIVE 3
0V = NORMAL
>1.5V = SHUTDOWN
2
16
SHUTDOWN 3
SHUTDOWN 5
+
1µF
10
VIN5
9
PDRIVE 5
P-CH
Si9430DY
0.01µF
N-CH
Si9410DY
1 SENSE +3
SENSE –3
28
NDRIVE 3
6
PGND3 SGND3 CT3
4
3 25
LTC1142
SENSE+5 15
SENSE – 5
14
NDRIVE 5
20
ITH3 ITH5 CT5 SGND5 PGND5
27
13 11
17 18
RC3 RC5
510Ω 510Ω
1000pF
N-CH
Si9410DY
CT3 CC3 CC5 CT5
390pF 3300pF 3300pF 200pF
+ 22µF
25V
×2
T1
30µH
RSENSE5
0.04Ω
100Ω
R1
100Ω
D2
MBRS140T3
R5
18k
220µF +
10V
×2
VN2222LL
VOUT5
5V/2A
12V ENABLE
0V = 12V OFF
>3V = 12V ON
(6V MAX)
RSENSE3: KRL SL-C1-1/2-0R050J
RSENSE5: KRL SL-C1-1/2-0R040J
L1: COILTRONICS CTX33-4
T1: DALE LPE-6562-A026
12V/150mA
+
22µF
25V
R3
20pF 649k
1%
2 ADJ
R4
294k
1%
PRIMARY: SECONDARY = 1:1.8
1
VOUT
5
SHUTDOWN
LT1121
GND
3
VIN 8
D3
MBRS140T3
22Ω
1000pF
C9
22µF +
35V
1142 F14
Figure 14. LTC1142 Triple Output Regulator with Switched 12V Output
VIN
8V TO 18V
FROM WALL ADAPTER
0V = CHARGE ON
>1.5V = CHARGE OFF
0V = OUTPUT ON
>1.5V = 3.3V OUTPUT OFF
D3
MBRS340T3
CIN1
22µF
35V
×2
RSENSE1
0.1Ω
L1
50µH
COUT1
220µF
10V
R2
274k
1%
R1
49.9k
1%
D1
MBRS140T3
100pF
RSENSE1: KRL SL-C1-1/2-1R100J
RSENSE2: KRL SL-C1-1/2-1R050J
L1: COILTRONICS CTX50-4
L2: COILTRONICS CTX25-4
0.22µF
0.22µF
P-CH
24
3
Si9430DY
23
VIN1
SHUTDOWN 1
PDRIVE 1
17
SHUTDOWN 2
10
VIN2 9
PDRIVE 2
P-CH
Si9433DY
1000pF
N-CH
Si9410DY
1 SENSE+1
SENSE–1
28
2 VFB1
NDRIVE 1
6
PGND1 SGND1 CT1
5
4 25
SENSE+2 15
LTC1142HV-ADJ
SENSE–2
14
VFB2 16
ITH1
27
ITH2
13
NDRIVE 2
20
CT2 SGND2 PGND2
11 18 19
RC1
RC2
1k
1k
1000pF
N-CH
Si9410DY
CT1
CC1
200pF 3300pF
CC2
CT2
3300pF 330pF
+ CIN2
22µF
25V
×2
VBATT
4 CELLS
NiCAD
L2
25µH
RSENSE2
0.05Ω
VOUT2
3.3V/2A
D2
MBRS140T3
100pF
+
R4
84.5k
1%
COUT2
220µF
10V
×2
R3
51k
1%
VN2222LL
“1” FOR TRICKLE CHARGE
RX
51Ω
FAST CHARGE = 130mV/RSENSE1 = 1.3A
TRICKLE CHARGE = 130mV/RSENSE1 = 100mA
1142 F15
Figure 15. LTC1142HV-ADJ High Efficiency Power Supply Providing 3.3V/2A with Built-In Battery Charger
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-
tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
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