LTC1772HS6 データシートの表示（PDF） - Linear Technology
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LTC1772HS6 Datasheet PDF : 12 Pages
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LTC1772
TYPICAL APPLICATIONS
LTC1772 3.3V to 5V/1A Boost Regulator
R4
10k
C3
220pF
VIN
3.3V
C1
47µF
16V
×2
1
6
ITH/RUN PGATE
LTC1772
2
GND
3
VFB
5
VIN
SENSE– 4
R1
0.033Ω
U1
2 54
3
L1
4.7µH
D1
+ C2
M1
100µF
10V
×2
VOUT
5V
1A
R2
422k
C1: AVXTPSE476M016R0047
C2: AVXTPSE107M010R0100
D1: IR10BQ015
L1: MURATA LQN6C-4R7 U1: FAIRCHILD NC7SZ04
M1: Si9804
R1: DALE 0.25W
ALSO SEE LTC1872
FOR THIS APPLICATION
R3
80.6k
1772 TA03
R4
10k
C3
220pF
LTC1772 5V/0.5A Flyback Regulator
R1
0.033Ω
1
6
ITH/RUN PGATE
LTC1772
2
GND
3
VFB
5
VIN
SENSE– 4
M1
C5
150pF
R6 CERAMIC
100Ω
D1
T1
R5
22Ω C4
•
10µH
10µH
+
100pF
CERAMIC
•
C2
47µF
16V
×2
VIN
2.5V
TO 9.8V
C2
100µF
10V
×2
VOUT
5V
0.5A
R2
52.3k
C1: AVXTPSE476M016R0047
C2: AVXTPSE107M010R0100
D1: IR10BQ015
M1: Si9803
R1: DALE 0.25W
T1: COILTRONICS CTX10-4
R3
10k
1772 TA04
RELATED PARTS
PART NUMBER
LTC1147 Series
LT1375/LT1376
LTC1622
DESCRIPTION
High Efficiency Step-Down Switching Regulator Controllers
1.5A, 500kHz Step-Down Switching Regulators
Low Input Voltage Current Mode Step-Down DC/DC Controller
LTC1624
LTC1625
LTC1627
LTC1649
High Efficiency SO-8 N-Channel Switching Regulator Controller
No RSENSETM Synchronous Step-Down Regulator
Low Voltage, Monolithic Synchronous Step-Down Regulator
3.3V Input Synchronous Controller
LTC1702
LTC1735
LTC1771
550kHz, 2 Phase, Dual Synchronous Controller
Single, High Efficiency, Low Noise Synchronous Switching Controller
Ultra-Low Supply Current Step-Down DC/DC Controller
LTC1872
SOT-23 Step-Up Controller
No RSENSE is a trademark of Linear Technology Corporation.
12 Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
COMMENTS
100% Duty Cycle, 3.5V ≤ VIN ≤ 16V
High Frequency, Small Inductor, High Efficiency
VIN 2V to 10V, IOUT Up to 4.5A, Synchronizable to
750kHz Optional Burst Mode Operation, 8-Lead MSOP
N-Channel Drive, 3.5V ≤ VIN ≤ 36V
97% Efficiency, No Sense Resistor
Low Supply Voltage Range: 2.65V to 8V, IOUT = 0.5A
No Need for 5V Supply, Uses Standard Logic Gate
MOSFETs; IOUT up to 15A
Two Channels; Minimum CIN and COUT, IOUT up to 15A
High Efficiency 5V to 3.3V Conversion at up to 15A
10µA Supply Current, 93% Efficiency,
1.23V ≤ VOUT ≤ 18V; 2.8V ≤ VIN ≤ 20V
2.5V ≤ VIN ≤ 9.8V; 550kHz; 90% Efficiency
1772fb
LT/LT 0605 500 REV B • PRINTED IN USA
© LINEAR TECHNOLOGY CORPORATION 1999
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