LTC1574CS-5 Linear Technology, LTC1574CS-5 Datasheet

IC DC/DC CONV STEP-DOWN 16-SOIC

LTC1574CS-5

Manufacturer Part Number
LTC1574CS-5
Description
IC DC/DC CONV STEP-DOWN 16-SOIC
Manufacturer
Linear Technology
Type
Step-Down (Buck), Invertingr
Datasheet

Specifications of LTC1574CS-5

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
5V
Current - Output
340mA, 600mA
Frequency - Switching
200kHz
Voltage - Input
4 ~ 18.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Power - Output
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC1574CS-5
Manufacturer:
LT
Quantity:
5
Part Number:
LTC1574CS-5
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LTC1574CS-5#PBF
Manufacturer:
LT
Quantity:
2 670
Part Number:
LTC1574CS-5#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LTC1574CS-5#TRPBF
Manufacturer:
LT
Quantity:
3 200
Part Number:
LTC1574CS-5#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
5.5V to
High Efficiency: Up to 94%
Usable in Noise-Sensitive Products
Peak Inductor Current Independent of Inductor Value
Short-Circuit Protection
Internal Low Forward Drop Schottky Diode
Only Three External Components Required
Wide V
Low Dropout Operation
Low-Battery Detector
Pin Selectable Current Limit
Internal 0.9 Power Switch: V
Standby Current: 130 A
Active Low Micropower Shutdown
Inverting Converters
Step-Down Converters
Memory Backup Supply
Portable Instruments
Battery-Powered Equipment
Distributed Power Systems
and LTC are registered trademarks and LT is a trademark of Linear Technology Corporation.
16V
V
IN
IN
12
11
Range: 4V to 18.5V (Absolute Maximum)
High Efficiency Step-Down Converter
6
LB
LB
I
PGM
IN
OUT
LTC1574-5
U
GND
V
IN
5
2, 4, 13, 15
SHDN
V
OUT
SW
** AVX TPSD107K010
* AVX TPSD226K035
COILTRONICS CTX100-4
7
10
3, 14
IN
U
< 11V
100 H
+
+
1574 TA01
22 F*
35V
100 F*
10V
5V
175mA
with Internal Schottky Diode
DESCRIPTIO
High Efficiency Step-Down
The LTC
DC/DC converters ideally suited for 9V to 5V, 5V to 3.3V
and inverting operation. With an internal 0.9 switch (at
a supply voltage of 12V) and a low forward drop Schottky
diode (0.450V typ at 200mA, T
requires only three external components to construct a
complete high efficiency DC/DC converter.
Under no load condition, the LTC1574 draws only 130 A.
In shutdown, it draws a mere 2 A making this converter
ideal for battery-powered applications. In dropout, the
internal P-channel MOSFET switch is turned on continu-
ously allowing the user to maximize the life of the battery
source.
The maximum inductor current of the LTC1574 family is
pin selectable to either 340mA or 600mA, optimizing
efficiency for a wide range of applications. Operation up to
200kHz permits the use of small surface mount inductors
and capacitors.
For applications requiring higher output current or ultra-
high efficiency, see the LTC1148 or LTC1265 data sheets.
For detailed applications information, see the LTC1174
data sheet.
®
1574 is a family of easy-to-use current mode
100
95
90
85
80
75
70
1
LTC1574-3.3/LTC1574-5
L = 100 H
V
I
PGM
OUT
DC/DC Converters
= 0V
= 5V
LTC1574-5 Efficiency
U
LOAD CURRENT (mA)
10
V
V
IN
IN
= 6V
= 9V
A
= 25 C), the LTC1574
100
1574 TA02
LTC1574
200
1

Related parts for LTC1574CS-5

LTC1574CS-5 Summary of contents

Page 1

... Standby Current: 130 A Active Low Micropower Shutdown U APPLICATIO S Inverting Converters Step-Down Converters Memory Backup Supply Portable Instruments Battery-Powered Equipment Distributed Power Systems and LTC are registered trademarks and trademark of Linear Technology Corporation. U TYPICAL APPLICATIO High Efficiency Step-Down Converter V IN 5.5V to 16V 5 V ...

Page 2

... Regulated Value OUT Minimum Voltage at Pin 7 for Device to Be Active Maximum Voltage at Pin 7 for Device Shutdown U W TOP VIEW ORDER PART NUMBER GND LTC1574CS LTC1574CS-3.3 GND LTC1574CS OUT OUT PACKAGE 16-LEAD PLASTIC SO = 125 C, = 110 C 0V, unless otherwise specified. PGM MIN TYP 1 ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T SYMBOL PARAMETER I SHDN Pin Input Current IH I SHDN Pin Input Current IL V Schottky Diode Forward Voltage F I Schottky Reverse Current R Note 1: Absolute Maximum Ratings are ...

Page 4

LTC1574 LTC1574-3.3/LTC1574 CTIO S NC (Pins 16): No Connection. GND (Pins 2, 4, 13, 15): Ground. SW (Pins 3, 14): Drain of P-Channel MOSFET Switch and Cathode of Schottky Diode. V (Pin ...

Page 5

... Figure 5 shows the V OUT low noise connection with C2 being the feed-forward R2 capacitor. The peak-to-peak output ripple is reduced to 30mV over the entire load range. A toroidal surface mount R1 Burst Mode is a trademark of Linear Technology Corporation 1574 • F03 ...

Page 6

LTC1574 LTC1574-3.3/LTC1574 APPLICATIO S I FOR ATIO inductor L1 is chosen for its excellent self-shielding prop- erties. Open magnetic structures such as drum and rod cores are to be avoided since they inject high flux levels into their ...

Page 7

... FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 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. ...

Page 8

... F 35V 6 140 2 8 170 10 200 12.5 235 † 100 F*** 50 H 10V V OUT 1574 TA06 –5V to 18V IN Output Ripple, SOT-23 Package P-P = 135 1.25V Q OUT , sn1574 1574fas LT/TP 1000 2K REV A • PRINTED IN LINEAR TECHNOLOGY CORPORATION 1995 V OUT 3.3V 425mA 2 USA ...

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