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LTC1530
1530fa
LT/TP 1002 1K REV A • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1998
TYPICAL APPLICATION
U
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear.com
LTC1530 –5V to 2.5V, 5A Inverting Polarity Converter
RELATED PARTS
C10
1µF
C5
0.1µF
C4
10µF
C
OUT
1500µF
6.3V
× 3
L1
2.5µH
R
SENSE
0.02Ω
Q4
2N3904
Q5
2N3904
R9
10k
R11
10k
R12
40k
R10
1k
R13
1k
Z2
BZX55C6V2
1/2W, 6.2V
PV
CC
GND
V
IN
= –5V
LTC1530-ADJ
G2
1
5
2
4
7
6
8
3
COMP
I
FB
I
MAX
G1
V
SENSE
1530 TA06
C
IN
, C
OUT
= 3× SANYO 6MV1500GX
L1 = PANASONIC ETQP6F2R5HA PCC-N6
Q1,Q2 = SILICONIX SUD50N03-10
R
SENSE
= DALE LVR-1, 1W
R
C
5.6k
R6
2k
R7
22Ω
C
C
0.1µF
Q1
Q2
GND
GND
Q3
2N3906
HARD CURRENT LIMIT CIRCUIT
(OPTIONAL)
C1
1000pF
R1
1.5K
R2
1k
V
OUT
*
2.5V
5A
Z1
1N4742A
(OPTIONAL)
MBRS130
R8
4.7Ω
MBRS130
+
C8
0.22µF
C9
1µF
+
C
IN
1500µF
6.3V
× 3
+
*FOR HIGHER OUTPUT VOLTAGE (EX 3.3V),
INCREASE R8 TO 20Ω AND INSTALL Z1
PART NUMBER DESCRIPTION COMMENTS
LTC1625/LTC1775 No R
SENSE
TM
Current Mode Synchronous Step-Down Controller 97% Efficiency; No Sense Resistor; 16-Pin SSOP
LTC1628 Dual, 2-Phase Synchronous Step-Down Controller Power Good Output; Minimum Input/Output Capacitors;
3.5V ≤ V
IN
≤ 36V, Synchronizable 150kHz to 300kHz
LTC1709-7 High Efficiency, 2-Phase Synchronous Step-Down Controller Up to 42A Output; 0.925V ≤ V
OUT
≤ 2V
with 5-Bit VID
LTC1709-8 High Efficiency, 2-Phase Synchronous Step-Down Controller Up to 42A Output; VRM 8.4; 1.3V ≤ V
OUT
≤ 3.5V
LTC1735 High Efficiency, Synchronous Step-Down Controller Burst Mode
®
Operation; 16-Pin Narrow SSOP;
3.5V ≤ V
IN
≤ 36V
LTC1736 High Efficiency, Synchronous Step-Down Controller with 5-Bit VID Mobile VID; 0.925V ≤ V
OUT
≤ 2V; 3.5V ≤ V
IN
≤ 36V
LTC1772 SOT-23 Step-Down Controller Current Mode; 550kHz; Very Small Solution Size
LTC1773 Synchronous Step-Down Controller Up to 95% Efficiency, 550kHz, 2.65V ≤ V
IN
≤ 8.5V,
0.8V ≤ V
OUT
≤ V
IN
, Synchronizable to 750kHz
LTC1778 No R
SENSE
, Wide Input Step-Down Controller No R
SENSE
Required, 4V ≤ V
IN
≤ 36V, True Current Mode,
0.8V ≤ V
OUT
, I
OUT
≤ 20A
LTC1876 2-Phase, Dual Synchronous Step-Down Controller with 3.5V ≤ V
IN
≤ 36V, Power Good Output, 300kHz Operation
Step-Up Regulator
LTC3701 Dual, Step-Down Controller Current Mode; 300kHz to 750kHz; Small 16-Pin SSOP,
V
IN
< 9.8V
LTC3713 Low V
IN
High Current Synchronous Step-Down Controller 1.5V ≤ V
IN
≤ 36V, 0.8V ≤ V
OUT
≤ (0.9)V
IN
, I
OUT
Up to 20A
LTC3778 Low V
OUT
, Optional R
SENSE
Synchronous Step-Down Controller 0.6V ≤ V
OUT
≤ (0.9)V
IN
, 4V ≤ V
IN
≤ 36V, I
OUT
Up to 20A
LTC3832 High Power, Low V
IN
Step-Down Controller 3V ≤ V
IN
≤ 8V, No R
SENSE
, V
OUT
≥ 0.6V, I
OUT
≤ 20A
Burst Mode is a registered trademark of Linear Technology Corporation. No R
SENSE
is a trademark of Linear Technology Corporation.
