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LT1307CN8

Description
Conv DC-DC 1V to 5V Step Up Single-Out 1.22V to 30V 0.5A 8-Pin PDIP N
CategoryPower/power management    The power supply circuit   
File Size365KB,20 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric View All

LT1307CN8 Overview

Conv DC-DC 1V to 5V Step Up Single-Out 1.22V to 30V 0.5A 8-Pin PDIP N

LT1307CN8 Parametric

Parameter NameAttribute value
EU restricts the use of certain hazardous substancesNot Compliant
ECCN (US)EAR99
Part StatusUnconfirmed
SVHCYes
SVHC Exceeds ThresholdYes
TypeStep Up
Output TypeAdjustable
Switching Frequency (kHz)750
Switching RegulatorYes
Number of Outputs1
Output Voltage (V)1.22 to 30
Maximum Output Current (A)0.5(Typ)
Minimum Input Voltage (V)1
Maximum Input Voltage (V)5
Operating Supply Voltage (V)1 to 5
Typical Quiescent Current (uA)50
Line Regulation1.5%/V
Minimum Operating Temperature (°C)-20
Maximum Operating Temperature (°C)70
Supplier Temperature GradeCommercial
Pin Count8
Standard Package NameDIP
Supplier PackagePDIP N
MountingThrough Hole
Package Height3.3
Package Length10.16(Max)
Package Width6.48
PCB changed8
Lead ShapeThrough Hole
LT1307/LT1307B
Single Cell Micropower
600kHz PWM DC/DC Converters
FEATURES
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
s
s
Uses Small Ceramic Capacitors
50µA Quiescent Current (LT1307)
1mA Quiescent Current (LT1307B)
Operates with V
IN
as Low as 1V
600kHz Fixed Frequency Operation
Starts into Full Load
Low Shutdown Current: 3µA
Low-Battery Detector
3.3V at 75mA from a Single Cell
Automatic Burst Mode
®
Operation at
Light Load (LT1307)
Continuous Switching at Light Load (LT1307B)
Low V
CESAT
Switch: 295mV at 500mA
The LT
®
1307/LT1307B are micropower, fixed frequency
DC/DC converters that operate from an input voltage as
low as 1V. First in the industry to achieve true current
mode PWM performance from a single cell supply, the
LT1307 features automatic shifting to power saving Burst
Mode operation at light loads. High efficiency is main-
tained over a broad 100µA to 100mA load range. The
LT1307B does not shift into Burst Mode operation at light
loads, eliminating low frequency output ripple at the
expense of light load efficiency. The devices contain a low-
battery detector with a 200mV reference and shut down to
less than 5µA. No load quiescent current of the LT1307 is
50µA and the internal NPN power switch handles a 500mA
current with a voltage drop of just 295mV.
Unlike competitive devices, large electrolytic capacitors
are
not required
with the LT1307/LT1307B in single cell
applications. The high frequency (600kHz) switching al-
lows the use of tiny surface mount multilayer ceramic
(MLC) capacitors along with small surface mount induc-
tors. The devices work with just 10µF of output capaci-
tance and require only 1µF of input bypassing.
The LT1307/LT1307B are available in 8-lead MSOP, PDIP
and SO packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
s
s
s
Pagers
Cordless Telephones
GPS Receivers
Battery Backup
Portable Electronic Equipment
Glucose Meters
Diagnostic Medical Instrumentation
TYPICAL APPLICATIO
L1
10µH
D1
C1
1µF
1.5V
CELL
SHUTDOWN
V
IN
LBI
SW
FB
R1
1.02M
1%
R2
604k
1%
EFFICIENCY (%)
LT1307
SHDN
LBO
GND
V
C
100k
680pF
C1: MURATA-ERIE GRM235Y5V105Z01
MARCON THCS50E1E105Z
TOKIN 1E105ZY5U-C103-F
3.3V
C2: MURATA-ERIE GRM235Y5V106Z01
75mA
MARCON THCS50E1E105Z
TOKIN 1E106ZY5U-C304-F
D1: MOTOROLA MBR0520L
C2
L1: COILCRAFT D01608C-103
10µF
SUMIDA CD43-100
MURATA ERIE LQH3C100
FOR 5V OUTPUT: R1 = 1M, R2 = 329k
1307 F01
Figure 1. Single Cell to 3.3V Boost Converter
U
Single Cell to 3.3V Converter Efficiency
90
80
V
IN
= 1.5V
V
IN
= 1V
V
IN
= 1.25V
70
60
50
0.1
1
10
LOAD CURRENT (mA)
100
1307 TA01
U
U
1307fa
1
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