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LTC1706CS8-19#TRPBF

P1-P3P4-P6P7-P8
7
LTC1706-19
TYPICAL APPLICATIO S
U
High Efficiency Low Noise Synchronous Step-Down Switching Regulator
Used with the LT1575-ADJ, which has a 1.21V reference,
the LTC1706-19 programs the output voltage of the
ultrafast transient response low dropout regulator that’s
ideal for today’s power-hungry microprocessors. How-
ever, since the LT1575 does not have a 1.19V reference,
the output range will instead be from 1.27V to 2.03V in
steps of 50.8mV.
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.
1706-19 TA04
IRFZ24
5Ω
3
2
V
IN
V
IN
12V
V
CC
3.3V
1
SHDN
LT1575-ADJ
GND
4
FB
6
7
I
NEG
8
I
POS
GATE
5
COMP
6
5
1µF
1000pF
7.5k
1µF
× 24
10pF
+
220µF
3.3V
ADJUSTABLE
V
OUT
1.27V TO 2.03V
(50.8mV STEPS)
1
8
VID1
7
VID0
V
CC
LTC1706-19
VID2
2
VID3
GND
3
4
SENSE
FB
0.1µF
1706-19 TA03
+
+
C
C
510pF
100pF
R
C
10k
C
SS
0.1µF
C
OSC
39pF
1000pF
L1
3.3µH
R
SENSE
0.02Ω
V
IN
4.5V TO 22V
V
OUT
1.3V TO 2V
5A
0.22µF
0.1µF
10k
C
IN
22µF
35V
X2
4.7µF
M1
Si4412DY
M2
Si4412DY
*D
B
*CMDSH-3
D1
MBRS140T3
+
C
OUT
100µF
10V
× 2
V
CC
FB
012
VID
LTC1706-19
FROM µP
3 GND
SENSE
V
IN
INTV
CC
C
OSC
EXTERNAL
FREQUENCY
SYNCHRONIZATION
SGND
V
PROG
PLL LPF PLLIN
NC
V
OSENSE
TGL
TGS
SW
PGND
BG
BOOST
RUN/SS
I
TH
SENSE
+
SENSE
–
LTC1436A-PLL
M3
IRLML2803
2
21
18
19
3
4
20
17
109
241
6
22
16
15
8
7
3
5
7812
4
6
Ultrafast Transient Response Low Dropout Regulator with Adjustable Output Voltage
8
LTC1706-19
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
www.linear-tech.com
LINEAR TECHNOLOGY CORPORATION 1999
170619f LT/TP 0299 4K • PRINTED IN USA
PACKAGE DESCRIPTIO
U
Dimensions in inches (millimeters) unless otherwise noted.
Burst Mode is a trademark of Linear Technlology Corporation.
TYPICAL APPLICATIO S
U
High Efficiency 3A SO-8 N-Channel Switching Regulator with Programmable Output
S8 Package
8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
1
2
3
4
0.150 – 0.157**
(3.810 – 3.988)
8
7
6
5
0.189 – 0.197*
(4.801 – 5.004)
0.228 – 0.244
(5.791 – 6.197)
0.016 – 0.050
0.406 – 1.270
0.010 – 0.020
(0.254 – 0.508)
× 45°
0°– 8° TYP
0.008 – 0.010
(0.203 – 0.254)
SO8 0996
0.053 – 0.069
(1.346 – 1.752)
0.014 – 0.019
(0.355 – 0.483)
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
TYP
DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH 
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD 
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
*
**
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LTC1174/LTC1174-3.3 High Efficiency Step-Down and Inverting DC/DC Converter Monolithic Switching Regulator, Burst Mode
TM
Operation
LTC1265 1.2A, High Efficiency Step-Down DC/DC Converter Constant Off-Time Monolithic, Burst Mode Operation
LT1375/LT1376 1.5A, 500kHz Step-Down Switching Regulator High Frequency, Small Inductor, High Efficiency
LTC1435/LTC1435A High Efficiency, Low Noise, Synchronous Step-Down Converter 16-Pin Narrow SO and SSOP
LTC1436/LTC1436-PLL High Efficiency, Low Noise, Synchronous Step-Down Converter 24-Pin Narrow and 24-Pin SSOP
LTC1438/LTC1439 Dual, Low Noise, Synchronous Step-Down Converter Multiple Output Capability
LTC1538-AUX Dual, Low Noise, Synchronous Step-Down Converter 5V Standby Regulator in Shutdown
1706-19 TA05
Si4412DY
10µH
MBRS340T3
R
SENSE
0.033Ω
3
2
I
TH
/RUN
1
SENSE
–
LTC1624
V
FB
4
GND
6
7
BOOST
8
V
IN
TG
5
V
OUT
1.3V TO 2V
3A
SW
V
IN
4.8V TO 20V
1
8
VID1
7
VID0
V
CC
LTC1706-19
VID2
2
VID3
GND
6
3
4
SENSE
5
FB
1000pF
0.1µF100pF
470pF
6.8k
+
C
IN
22µF
35V
× 2
V
CC
0.1µF
+
C
OUT
100µF
10V
× 2
P1-P3P4-P6P7-P8

LTC1706CS8-19#TRPBF

Mfr. #:
Buy LTC1706CS8-19#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Power Management Specialized - PMIC VID V Progmer
Lifecycle:
New from this manufacturer.
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