LT1300CS8 Linear Technology, LT1300CS8 Datasheet

IC DC/DC CONV STP-UP HI-EFF8SOIC

LT1300CS8

Manufacturer Part Number
LT1300CS8
Description
IC DC/DC CONV STP-UP HI-EFF8SOIC
Manufacturer
Linear Technology
Type
Step-Up (Boost)r
Datasheet

Specifications of LT1300CS8

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
3.3V, 5V
Current - Output
220mA
Frequency - Switching
155kHz
Voltage - Input
1.8 ~ 10 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Power - Output
500mW
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LT1300CS8
Manufacturer:
LT
Quantity:
10 000
Part Number:
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LT/凌特
Quantity:
20 000
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FEATURES
APPLICATIONS
TYPICAL APPLICATIONS
L1 = COILCRAFT DO1608-103
C1 = AVX TPSD107M010R0100
D1 = MBRS130LT3
Up to 220mA Output Current at 5V from 2V Supply
Supply Voltage as Low as 1.8V
Up to 88% Efficiency
Small Inductor –10 H
120 A Quiescent Current
Shutdown to 10 A
Programmable 3.3V or 5V Output
I
Low V
Uses Inexpensive Surface Mount Inductors
8-Lead DIP or SOIC Package
Palmtop Computers
Portable Instruments
Bar-Code Scanners
DC/DC Converter Module Replacements
Battery Backup Supplies
Personal Digital Assistants
PCMCIA Cards
LIM
2
AA
CELL
OR SUMIDA CD54-100
OR SANYO OS-CON 16SA100M
OR 1N5817
Pin Programs Peak Switch Current
CESAT
+
SHUTDOWN
Two-Cell to 3.3V/5V Step-Up Converter
C1
100µF
5V/3.3V
SELECT
Switch: 170mV at 1A Typical
2
3
U
SELECT
SHDN
PGND
V
IN
6
8
LT1300
10µH
L1
SENSE
GND
1
SW
I
U
LIM
7
4
5
N/C
N
D1
3.3/5V Step-Up DC/DC Converter
+
C1
100µF
5V/3.3V
OUTPUT
LT1300 TA1
Micropower High Efficiency
DESCRIPTION
The LT1300 is a micropower step-up DC/DC converter that
utilizes Burst Mode™ operation. The device can deliver 5V
or 3.3V from a two-cell battery input. It features program-
mable 5V or 3.3V output via a logic-controlled input, no-
load quiescent current of 120 A and a shutdown pin which
reduces supply current to 10 A. The on-chip power switch
has a low 170mV saturation voltage at a switch current of
1A, a four-fold reduction over prior designs. A 155kHz
internal oscillator allows the use of extremely small sur-
face mount inductors and capacitors. Operation is guaran-
teed at 1.8V input. This allows more energy to be extracted
from the battery increasing operating life. The I
be used to program peak switch current with a single
resistor allowing the use of less expensive and smaller
inductors and capacitors in lighter load applications. The
LT1300 is available in an 8-lead SOIC package, minimizing
board space requirements. For a 5V/12V Selectable Out-
put Converter see the LT1301. For increased output cur-
rent see the LT1302.
Burst Mode is a trademark of Linear Technology Corporation.
90
82
74
88
86
84
80
78
76
1
5V Output Efficiency
U
LOAD CURRENT (mA)
10
100
V
V
V
V
IN
IN
IN
IN
LT1300 TA2
= 4.0V
= 3.0V
= 2.5V
= 2.0V
500
LT1300
LIM
pin can
1

Related parts for LT1300CS8

LT1300CS8 Summary of contents

Page 1

... The LT1300 is available in an 8-lead SOIC package, minimizing board space requirements. For a 5V/12V Selectable Out- put Converter see the LT1301. For increased output cur- rent see the LT1302. Burst Mode is a trademark of Linear Technology Corporation 5V/3.3V OUTPUT ...

Page 2

... Note 1: Hysteresis specified is DC. Output ripple may be higher if output capacitance is insufficient or capacitor ESR is excessive. See applications section INFORMATION ORDER PART TOP VIEW NUMBER 1 PGND LT1300CN8 LT1300CS8 LIM S8 PACKAGE S8 PART MARKING 8-LEAD PLASTIC SOIC 1300 = 100 C, = 150 C/ W JMAX JA MIN TYP MAX 120 200 7 1.8 2 ...

Page 3

W U TYPICAL PERFORMANCE CHARACTERISTICS Efficiency 3.3V OUT 10µ 2. 100 ...

Page 4

LT1300 PIN FUNCTIONS GND (Pin 1): Signal Ground. Sel (Pin 2): Output Select. When tied to V converter regulates at 5V. When grounded converter regulates at 3.3V. SHDN (Pin 3): Shutdown. Pull high to effect shutdown. Tie ...

Page 5

TEST CIRCUITS U OPERATION Operation of the LT1300 is best understood by referring to the Block Diagram in Figure 1. When A1’s negative input, related to the Sense pin voltage by the appropriate resis- tor-divider ratio, is higher that the ...

Page 6

LT1300 U U APPLICATIONS INFORMATION Output Voltage Selection The LT1300 can be selected to 3. under logic control or fixed at either by tying SELECT to ground or V respectively permissible to tie SELECT to a ...

Page 7

... Suggested capacitor sources are listed in Table 2. 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

... BSC LT/GP 0394 10K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1994 LT1300 TA6 0.250 ± 0.010 (6.350 ± 0.254) N8 0392 5 0.150 – 0. (3.810 – SO8 0294 ...

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