LT1305CS8 Linear Technology, LT1305CS8 Datasheet

IC DC/DC CONV STP-UP MCRPWR8SOIC

LT1305CS8

Manufacturer Part Number
LT1305CS8
Description
IC DC/DC CONV STP-UP MCRPWR8SOIC
Manufacturer
Linear Technology
Type
Step-Up (Boost)r
Datasheet

Specifications of LT1305CS8

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
5V
Current - Output
400mA
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

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LT1305CS8
Manufacturer:
LT/凌特
Quantity:
20 000
Part Number:
LT1305CS8#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURE
A
TYPICAL
C1, C2: AVX TPSE227010R0100
D1: MOTOROLA MBRS130LT3
L1: COILCRAFT D03316-103
PPLICATI
2-Cell and 3-Cell to 5V Conversion
EL Panel Drivers
Portable Instruments
5V at 400mA from 2V Input
Supply Voltage As Low As 1.8V
120 A Quiescent Current
Low-Battery Detector
Low V
Uses Inexpensive Surface Mount Inductors
8-Lead SO Package
2 TO 3
CELLS
CESAT
2-Cell and 3-Cell to 5V/400mA DC/DC Converter
+
C1
220 F
A
S
Switch: 310mV at 2A Typ
O
PPLICATI
with Low-Battery Detect
U
316k
1%
SHUTDOWN
412k
1%
S
LBI
SHDN
O
GND
V
IN
U
LT1305
10 H
L1
PGND
SW
LBO
FB
D1
100k
1%
100k
301k
1%
220 F
C2
+
D
The LT
that uses Burst Mode
the LT1305 features a 2A internal low-loss switch and can
deliver up to four times the output power of the LT1303.
Quiescent current is only 120 A and the Shutdown pin
further reduces current to 10 A. A low-battery detector
provides an open-collector output that goes low when the
input voltage drops below a preset level. The LT1305 is
available in an 8-pin SO, easing board space requirements.
Burst Mode is a trademark of Linear Technology Corporation
LOW BATTERY
GOES LOW AT
V
V
5V
400mA
BAT
OUT
, LTC and LT are registered trademarks of Linear Technology Corporation.
ESCRIPTIO
LT1305 • TA03
= 2.2V
Micropower High Power
®
DC/DC Converter with
1305 is a micropower step-up DC/DC converter
Low-Battery Detector
U
TM
90
80
70
60
operation. Similar to the LT1303,
1
LOAD CURRENT (mA)
10
Efficiency
V
V
IN
IN
= 4.00V
= 3.00V
100
LT1305
V
V
IN
IN
LT1305 • TA02
= 2.00V
= 2.50V
1
1000

Related parts for LT1305CS8

LT1305CS8 Summary of contents

Page 1

... A. A low-battery detector provides an open-collector output that goes low when the input voltage drops below a preset level. The LT1305 is available in an 8-pin SO, easing board space requirements. , LTC and LT are registered trademarks of Linear Technology Corporation. Burst Mode is a trademark of Linear Technology Corporation L1 D1 ...

Page 2

... A LOAD V = 1.3V LBI LBO SHDN SHDN SHDN Note 2: Low-battery detector comparator is inoperative when device is in shutdown ORDER PART TOP VIEW NUMBER 8 PGND LT1305CS8 LBI S8 PART MARKING S8 PACKAGE 1305 = MIN TYP MAX 120 200 7 15 1.8 1.55 2.0 1.22 1.24 1. ...

Page 3

W U TYPICAL PERFORMANCE CHARACTERISTICS Switch On Time –50 – 100 TEMPERATURE ( C) LT1305 • G01 Quiescent Current 200 SWITCH OFF 190 180 ...

Page 4

LT1305 W U TYPICAL PERFORMANCE CHARACTERISTICS Low-Battery Detect Trip Point 1.250 1.245 1.240 1.235 1.230 1.225 1.220 1.215 1.210 1.205 1.200 –50 – TEMPERATURE ( C) LT1305 • G10 CTIO S ...

Page 5

W BLOCK DIAGRAM REFERENCE OPERATION Operation of the LT1305 is best understood by referring to the Block Diagram in Figure 1. When C1’s negative input, related to the output voltage ...

Page 6

LT1305 U OPERATION If switch current reaches 2A, causing C2 to trip, switch on time is reduced and off time increases slightly. This allows continuous operation during bursts. C2 monitors the voltage across 3 resistor R1 which is directly related ...

Page 7

... TO 1000Hz SQUARE WAVE DRIVE 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. N 1N5817 3 ...

Page 8

... Low Noise, Fixed Frequency Operation Includes Current Limit and Thermal Shutdown : 499-3977 0.189 – 0.197* (4.801 – 5.004 0.150 – 0.157* (3.810 – 3.988 0.004 – 0.010 (0.101 – 0.254) 0.050 (1.270) BSC SO8 0294 LT/GP 0595 10K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1995 ...

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