LTC1439 Linear Technology, LTC1439 Datasheet - Page 32

• Manufacturer Part Number: LTC1439
• Description: Dual High Efficiency/ Low Noise/ Synchronous Step-Down Switching Regulators
• Manufacturer: Linear Technology

LTC1438/LTC1439
RELATED PARTS
32
TYPICAL
PART NUMBER
LTC1142/LTC1142HV
LTC1148/LTC1148HV
LTC1159
LT
LTC1430
LTC1435
LTC1436/LTC1436-PLL/ High Efficiency Low Noise Synchronous Step-Down
LTC1437
LT1510
LTC1538-AUX
LTC1539
®
1375/LT1376
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone]
APPLICATION
DESCRIPTION
Dual High Efficiency Synchronous Step-Down Switching Regulators
High Efficiency Step-Down Switching Regulator Controllers
High Efficiency Step-Down Switching Regulator Controller
1.5A, 500kHz Step-Down Switching Regulators
High Power Step-Down Switching Regulator Controller
Single High Efficiency Low Noise Switching Regulator Controller
Switching Regulator Controllers
Constant-Voltage/Constant-Current Battery Charger
Dual, Synchronous Controller with AUX Regulator
Dual High Efficiency, Low Noise, Synchronous Step-Down
Switching Regulator Controller
FAX
: [phone]
ON/OFF
2.9V
TELEX
U
AUXON
LTC1439
: 499-3977
3.3V to 2.9V at 3A Low Noise Linear Regulator
AUXDR
AUXFB
6.8nF
47k
22pF
Q1
MMBT2907ALTI
27
100
316k
1%
221k
1%
5V
10
+
ZETEX
FZT849
(SURFACE MOUNT)
COMMENTS
Dual Synchronous, V
Synchronous, V
Synchronous, V
High Frequency, Small Inductor, High Efficiency
Switchers, 1.5A Switch
High Efficiency 5V to 3.3V Conversion at Up to 15A
16-Pin Narrow SO and SSOP Packages
Full-Featured Single Controller
1.3A, Li-Ion, NiCd, NiMH, Pb-Acid Charger
5V Standby in Shutdown
5V Standby in Shutdown
330 F
3.3V
2.9V
3A
1438 TA05
2
14389fa LT/GP 0197 REV A 5K • PRINTED IN USA
IN
IN
LINEAR TECHNOLOGY CORPORATION 1997
20V
40V, For Logic Threshold FETs
IN
20V