LT1176CSW#PBF Linear Technology, LT1176CSW#PBF Datasheet

IC MULTI CONFIG ADJ 1A 20SOIC

LT1176CSW#PBF

Manufacturer Part Number
LT1176CSW#PBF
Description
IC MULTI CONFIG ADJ 1A 20SOIC
Manufacturer
Linear Technology
Type
Step-Down (Buck), Inverting, Flybackr
Datasheet

Specifications of LT1176CSW#PBF

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
2.2 ~ 29.8 V
Current - Output
1A
Frequency - Switching
100kHz
Voltage - Input
8 ~ 35 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
20-SOIC (7.5mm Width)
Power - Output
1W
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LT1176CSW#PBFLT1176CSW
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LT1176CSW#PBF
Manufacturer:
LINEAR
Quantity:
400
Company:
Part Number:
LT1176CSW#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
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LT1176CSW#PBF
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10 571
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Part Number:
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Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
APPLICATIONS
DESCRIPTION
The LT
which requires only a few external parts for normal opera-
tion. The power switch, all oscillator and control circuitry
TYPICAL APPLICATION
n
n
n
n
n
n
n
n
n
n
n
n
10V T0 35V
1.2A Onboard Switch
100kHz Switching Frequency
Excellent Dynamic Behavior
DIP and Surface Mount Packages
Only 8mA Quiescent Current
Preset 5V Output Available
Operates Up to 35V Input
Micropower Shutdown Mode
Buck Converter with Output Voltage Range of
2.5V to 30V
Positive-to-Negative Converter
Negative Boost Converter
Multiple Output Buck Converter
®
1176 is a 1A monolithic bipolar switching regulator
*COILTRONICS #100-1-52
PULSE ENGINEERING, INC. #PE-92102
HURRICANE #HL-AG210LL
THESE ARE LOW COST POWDERED IRON CORES. OPTIMUM EFFICIENCY
AND SMALLEST SIZE IS OBTAINED BY USING A LOW LOSS CORE SUCH
AS MAGNETICS INC. KOOL Mµ. SEE EFFICIENCY GRAPH.
+
C3
100µF
Basic 5V Positive Buck Converter
V
IN
GND
LT1176-5
SENSE
V
V
C
SW
R3
2.7k
C2
0.01µF
1N5819
100µH
L1*
11765 TA01
+
C1
470µF
25V
5V, 0.8A
L, LT, LTC, LTM, Linear Technology, SwitcherCAD and the Linear logo are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
and all current limit components are included on the chip.
The topology is a classic positive buck configuration but
several design innovations allows this device to be used as
a positive-to-negative converter, a negative boost converter,
and as a flyback converter. The switch output is specified
to swing below ground.
The LT1176 uses a true analog multiplier in the feedback
loop. This makes the device respond nearly instantaneously
to input voltage fluctuations and makes loop gain indepen-
dent of input voltage. As a result, dynamic behavior of the
regulator is significantly improved over previous designs.
On-chip pulse by pulse current limiting makes the LT1176
nearly bust proof for output overloads or shorts. The input
voltage range as a buck converter is 8V to 35V, but a self
boot feature allows input voltages as low as 5V in the
inverting and boost configurations.
The LT1176 is available in a low cost 8-lead DIP package
with frequency preset at 100kHz and current limit at 1.7A.
An adjustable output is offered as well as a preset 5V ver-
sion. For further design details and application help, see
the LT1074/LT1076 data sheet and Application Note 44.
Switching Regulator
90
80
70
60
L = 100µH ON MAGNETICS INC.
SIZE T-50 KOOL Mµ CORE
V
0.1
IN
5V Buck Converter Efficiency
= 10V
0.2
LT1176/LT1176-5
0.3
LOAD CURRENT (A)
V
IN
0.4
= 20V
0.5
Step-Down
0.6
0.7
0.8
11765 TA02
0.9
1.0
11765fb
1

Related parts for LT1176CSW#PBF

LT1176CSW#PBF Summary of contents

Page 1

... For further design details and application help, see the LT1074/LT1076 data sheet and Application Note 44. L, LT, LTC, LTM, Linear Technology, SwitcherCAD and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. L1* 100µ ...

Page 2

... ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LT1176CN8#PBF LT1176CN8-5#PBF LT1176CSW#PBF LT1176CSW#TRPBF LT1176CSW-5#PBF LT1176CSW-5#TRPBF Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container. For more information on lead free part marking, go to: ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T PARAMETER Switch ON Voltage (Note 2) Switch OFF Leakage Supply Current (Note 3) Minimum Supply Voltage Switch Current Limit (Note 5) Maximum Duty Cycle Switching Frequency Switching Frequency Line Regulation Error ...

Page 4

LT1176/LT1176-5 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T PARAMETER Status Low Level Status Delay Time Status Minimum Width Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any ...

Page 5

BLOCK DIAGRAM INPUT SUPPLY 0.3V 10µA + µPOWER SHUTDOWN – 2.35V CURRENT LIMIT SHUTDOWN + – SHUTDOWN OUTPUT VOLTAGE MONITOR + A1 STATUS ERROR 2.21V AMP – 2.8k 2.2k* FB/SENSE *CONNECTED ON 5V VERSION ONLY 320µ ALL ...

Page 6

LT1176/LT1176-5 PACKAGE DESCRIPTION .300 – .325 (7.620 – 8.255) .008 – .015 (0.203 – 0.381) +.035 .325 –.015 ( ) +0.889 8.255 –0.381 NOTE: 1. DIMENSIONS ARE MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR ...

Page 7

... Revised Shutdown Pin Current in Electrical Characteristics 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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 8

... TYP www.linear.com ● .496 – .512 NOTE .394 – .419 (10.007 – 10.643) N .037 – .045 (0.940 – 1.143) .004 – .012 (0.102 – 0.305) S20 (WIDE) 0502 LT 0211 REV B • PRINTED IN USA  LINEAR TECHNOLOGY CORPORATION 1993 11765fb ...

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