LT1308CS8 Linear Technology, LT1308CS8 Datasheet

IC DC/DC CONV SINGLE CELL 8-SOIC

LT1308CS8

Manufacturer Part Number
LT1308CS8
Description
IC DC/DC CONV SINGLE CELL 8-SOIC
Manufacturer
Linear Technology
Type
Step-Up (Boost)r
Datasheet

Specifications of LT1308CS8

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
1
Voltage - Output
5V
Current - Output
1A
Frequency - Switching
600kHz
Voltage - Input
1 ~ 10 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-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:
LT1308CS8
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LT1308CS8#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Part Number:
LT1308CS8#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
FEATURES
APPLICATIONS
TYPICAL
C1: CERAMIC
C2: AVX TPS SERIES
D1: INTERNATIONAL RECTIFIER 10BQ015
L1: COILTRONICS CTX5-1
5V at 1A from a Single Li-Ion Cell
3.3V at 300mA from a Single NiCd Cell
Low Quiescent Current: 100 A
Operates with V
Fixed Frequency Operation: 600kHz
Current Mode PWM Delivers Low Output Ripple
Guaranteed Start-Up into Full Load
Low Shutdown Current: 3 A
Low-Battery Comparator
Automatic Burst Mode
Low V
GSM Terminals
Digital Cameras
Answer-Back Pagers
Cordless Telephones
DECT Phones
GPS Receivers
Battery Backup Supplies
4.2V TO 3V
COILCRAFT DO3316-472
Figure 1. Single Li-Ion Cell to 5V/1A DC/DC Converter
Li-Ion
CELL
CESAT
C1
10 F
APPLICATION
Switch: 300mV at 2A
IN
U
SHDN
LBI
LBO
as Low as 1V
V
C
R
47k
LT1308
C
C
22nF
TM
C
Operation at Light Load
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.
GND
V
SW
IN
FB
U
R2
100k
301k
R1
+
L1
4.7 H
D1
C2
100 F
5V
1A
1308F01
DESCRIPTION
The LT
DC/DC converter that operates from an input voltage as
low as 1V. Capable of delivering 5V at load current of 1A
from a single Li-Ion cell, the LT1308 also features power
saving Burst Mode operation at light loads. High efficiency
is maintained over a broad 1mA to 1A load range.
The device contains a low-battery detector with a 200mV
reference and shuts down to less than 5 A quiescent
current. No-load quiescent current is 100 A and the
internal NPN power switch handles a 2A current with a
voltage drop of just 300mV.
High frequency 600kHz switching allows the use of small,
surface mount components. The LT1308’s current mode
architecture provides fast response to load and line varia-
tions. The device is available in an 8-lead SO package.
Burst Mode is a trademark of Linear Technology Corporation.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Boost DC/DC Converter
Single Cell High Current
®
1308 is a micropower, fixed frequency boost
95
90
85
80
75
70
65
1
Micropower 600kHz
Converter Efficiency
U
V
V
IN
LOAD CURRENT (mA)
IN
Final Electrical Specifications
10
= 4.2V
= 3V
V
IN
= 3.6V
100
January 1998
1308 F01a
1000
LT1308
1

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LT1308CS8 Summary of contents

Page 1

... Figure 1. Single Li-Ion Cell to 5V/1A DC/DC Converter 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 2

... V = 1.2V OUT 1.1V SHDN SHDN SHDN SINK V = 250mV LBI LBO V = 150mV LBI U W ORDER PART TOP VIEW NUMBER 8 LBO LT1308CS8 7 LBI LT1308IS8 PART MARKING S8 PACKAGE 1308 1308I = 80 C/W JA MIN TYP MAX 80 160 1 3 1.20 1.22 1. 0.6 1.1 1.5 0.3 0.8 ...

Page 3

ELECTRICAL C HARA TERISTICS C Commercial Grade 1.1V SYMBOL PARAMETER Low-Battery Detector Gain Switch Leakage Current Reverse Battery Current Commercial Grade T = – 1.1V ...

Page 4

LT1308 ELECTRICAL C HARA TERISTICS C Industrial Grade – 1.2V SYMBOL PARAMETER Shutdown Pin Current LBI Threshold Voltage LBO Output Low LBO Leakage Current LBI Input Bias Current (Note 4) Low-Battery ...

Page 5

PIN FUNCTIONS SW (Pin 5): Switch Pin. Connect inductor/diode here. Minimize trace area at this pin to keep EMI down. V (Pin 6): Supply Pin. Must have local bypass capacitor IN right at the pin, connected directly ...

Page 6

LT1308 U U APPLICATIONS INFORMATION distance from the circuit, an additional input capacitor may be required. A 220 F aluminum electrolytic unit works well in these cases. This capacitor need not have low ESR. OPERATION FROM A LABORATORY POWER SUPPLY ...

Page 7

U U APPLICATIONS INFORMATION DECT PHONES The DECT standard specifies a transmit pulse 416 s in duration. The LT1308 is capable of delivering a 400mA pulse load from a 1.2V input with output capacitance of 100 F. Figure 11 depicts ...

Page 8

... L1E CCD BIAS 5 –10V 10mA 1308 TA01 D4 0.189 – 0.197* (4.801 – 5.004 0.150 – 0.157** 0.228 – 0.244 (3.810 – 3.988) (5.791 – 6.197 SO8 0695 , 300mA MSOP Package Q Q 1308i LT/TP 0198 4K • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 1998 ...

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