LTC1514CS8-5#PBF Linear Technology, LTC1514CS8-5#PBF Datasheet

IC MULTI CONFIG 5V 50MA 8SOIC

LTC1514CS8-5#PBF

Manufacturer Part Number
LTC1514CS8-5#PBF
Description
IC MULTI CONFIG 5V 50MA 8SOIC
Manufacturer
Linear Technology
Type
Step-Down (Buck), Step-Up (Boost), Switched Capacitor (Charge Pump)r
Datasheet

Specifications of LTC1514CS8-5#PBF

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
5V
Current - Output
50mA
Frequency - Switching
650kHz
Voltage - Input
2 ~ 10 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power - Output
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LTC1514CS8-5#PBFLTC1514CS8-5
Manufacturer:
LT
Quantity:
10 000
APPLICATIONS
FEATURES
TYPICAL
LOW BAT
ON OFF
3.3V or 5V Output Voltages
2V to 10V Input Voltage Range
Up to 50mA Output Current
Only Three External Capacitors Required
Soft Start Limits Inrush Current at Turn-On
Low Operating Current: 60 A
Low Shutdown Current: 10 A
Shutdown Disconnects Load from V
Short-Circuit and Overtemperature Protected
650kHz Switching Frequency
Low-Battery Comparator Active in Shutdown
Available in SO-8 Package
Battery-Operated Equipment
Smart Card Readers
Local Power Supplies
Handheld Instruments
Battery Backup Supplies
5V Step-Up/Step-Down Power Supply with Low-Battery Detect
1.33M
1%
499k
1%
APPLICATION
U
1
2
3
4
SHDN
LBO
LBI
GND
LTC1514-5
100k
V
OUT
C1
C1
V
IN
+
8
7
6
5
U
0.22 F
IN
+
10 F
+
V
I
OUT
OUT
10 F
1514 TA01
= 50mA
= 5V
Capacitor DC/DC Converters
Step-Up/Step-Down Switched
with Low-Battery Comparator
DESCRIPTION
The LTC
capacitor DC/DC converters that produce a regulated
output voltage by either stepping up or stepping down
the input voltage. Output voltage is fixed at either 3.3V
(LTC1514-3.3) or 5V (LTC1514-5) by an internal resistor
divider.
A unique architecture allows the parts to accommodate
a wide input voltage range (2V to 10V) while maintaining
inrush current and output voltage ripple when large V
to V
An internal uncommitted comparator is kept active in
shutdown. The comparator has an open-drain output for
flexible interfacing.
The parts are short-circuit and overtemperature pro-
tected. Battery life is maximized by very low operating
currents (I
are available in an SO-8 package.
V
4-CELL
NiCd
4% regulation. Additional circuitry prevents excessive
IN
, LTC and LT are registered trademarks of Linear Technology Corporation.
OUT
®
differentials are present.
1514-3.3/LTC1514-5 are micropower switched
CC
LTC1514-3.3/LTC1514-5
= 60 A typ, 10 A in shutdown). Both parts
5.2
5.1
5.0
4.9
4.8
U
2
I
OUT
3
LTC1514-5 Output Voltage
= 10mA
4
vs Input Voltage
INPUT VOLTAGE (V)
5
6
7
8
LT1514 • TA02
9
10
1
IN

Related parts for LTC1514CS8-5#PBF

LTC1514CS8-5#PBF Summary of contents

Page 1

... The comparator has an open-drain output for flexible interfacing. The parts are short-circuit and overtemperature pro- tected. Battery life is maximized by very low operating currents (I CC are available in an SO-8 package. , LTC and LT are registered trademarks of Linear Technology Corporation OUT I = 50mA OUT ...

Page 2

... SINK 5V, LBI = V LBO SHDN = V IN SHDN = OUT Soft Start Turn-On Time Note 2: For INFORMATION ORDER PART NUMBER TOP VIEW LTC1514CS8-3 OUT LTC1514CS8 LTC1514IS8-3 LTC1514IS8-5 – PACKAGE S8 PART MARKING = 125 C, = 110 15143 1514I3 15145 1514I5 MIN TYP MAX 2.0 8 2.7 10 3.17 3.3 3 ...

Page 3

W U TYPICAL PERFORMANCE CHARACTERISTICS LTC1514-3.3 Efficiency vs Output Current 100 V = 3.3V OUT 4. 2. ...

Page 4

LTC1514-3.3/LTC1514 TYPICAL PERFORMANCE CHARACTERISTICS LTC1514-5 Step-Down Mode Load Transient Response V OUT AC COUPLED 100mV/DIV I OUT 50mA/DIV OUT OUT W BLOCK DIAGRAM V IN SHDN ...

Page 5

PIN FUNCTIONS battery comparator and 1.145V reference are kept alive in shutdown. GND (Pin 4): Ground. Should be tied to a ground plane for best performance. – C1 (Pin 5): Charge Pump Flying Capacitor, Negative Terminal. + ...

Page 6

LTC1514-3.3/LTC1514 APPLICATIONS INFORMATION output pin cause high frequency voltage spikes on V with every clock cycle. There are several ways to reduce the output voltage ripple. A larger C capacitor ( greater) will OUT reduce both ...

Page 7

... ON OFF 499k 1% 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 low. The open-drain comparator output allows for flex- ible interfacing between the LBO output and external logic ...

Page 8

... SO8 0996 10V, 3.3V, 5V and ADJ Versions 50mA OUT = 20mA (V 2V 50mA (V 3V) IN OUT IN 151435f LT/TP 0298 4K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1997 = 20mA OUT ...

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