OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

LT1300CS8#TRPBF

P1-P3P4-P6P7-P8
1
LT1300
■
Up to 220mA Output Current at 5V from 2V Supply
■
Supply Voltage as Low as 1.8V
■
Up to 88% Efficiency
■
Small Inductor –10µH
■
120µA Quiescent Current
■
Shutdown to 10µA
■
Programmable 3.3V or 5V Output
■
I
LIM
Pin Programs Peak Switch Current
■
Low V
CESAT
Switch: 170mV at 1A Typical
■
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
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 120µA and a shutdown pin which
reduces supply current to 10µA. 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
LIM
pin can
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.
DESCRIPTION
U
FEATURES
TYPICAL APPLICATIONS N
U
Micropower High Efficiency
3.3/5V Step-Up DC/DC Converter
APPLICATIONS
U
Two-Cell to 3.3V/5V Step-Up Converter 5V Output Efficiency
L1 = COILCRAFT DO1608-103
OR SUMIDA CD54-100
C1 = AVX TPSD107M010R0100
OR SANYO OS-CON 16SA100M
D1 =MBRS130LT3
OR 1N5817
C1
100µF
5V/3.3V
OUTPUT
+
+
L1
10µH D1
C1
100µF
2×
AA
CELL
SW
I
LIM
PGND
GND
SENSE
LT1300
SELECT
LT1300 TA1
5V/3.3V
SELECT
SHDN
SHUTDOWN
N/C
2
67
4
5
81
3
V
IN
LOAD CURRENT (mA)
10 100 500
LT1300 TA2
1
74
EFFICIENCY (%)
76
78
80
82
90
84
86
88
V
IN
= 4.0V
V
IN
= 3.0V
V
IN
= 2.5V
V
IN
= 2.0V
Burst Mode is a trademark of Linear Technology Corporation.
2
LT1300
ORDER PART
NUMBER
ABSOLUTE MAXIMUM RATINGS
W
WW
U
PACKAGE/ORDER INFORMATION
W
U
U
V
IN
Voltage .............................................................. 10V
SW1 Voltage ............................................................ 20V
Sense Voltage .......................................................... 10V
SHUTDOWN Voltage................................................ 10V
SELECT Voltage ....................................................... 10V
I
LIM
Voltage ............................................................ 0.5V
Maximum Power Dissipation ............................. 500mW
Operating Temperature Range ..................... 0°C to 70°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
S8 PART MARKING
T
JMAX
= 100°C, θ
JA
= 150°C/W
1300
LT1300CN8
LT1300CS8
Consult factory for Industrial grade parts.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
Q
Quiescent Current V
SHDN
= 0.5V, V
SEL
= 5V, V
SENSE
= 5.5V ● 120 200 µA
V
SHDN
= 1.8V ● 715 µA
V
IN
Input Voltage Range 1.8 V
● 2.0 V
V
OUT
Output Sense Voltage V
SEL
= 5V ● 4.80 5.0 5.20 V
V
SEL
= 0V ● 3.15 3.3 3.45 V
Output Referred V
SEL
= 5V (Note 1) ● 22 50 mV
Comparator Hysteresis V
SEL
= 0V (Note 1) ● 14 35 mV
Oscillator Frequency Current Limit not Asserted. See Test Circuit. 120 155 185 kHz
Oscillator TC 0.2 %/°C
DC Maximum Duty Cycle 75 86 95 %
t
ON
Switch On Time Current Limit not Asserted. 5.6 µs
Output Line Regulation 1.8V < V
IN
< 6V ● 0.06 0.15 %/V
V
CESAT
Switch Saturation Voltage I
SW
= 700mA ● 130 200 mV
Switch Leakage Current V
SW
= 5V, Switch Off ● 0.1 10 µA
Peak Switch Current I
LIM
Floating (See Typical Application) 0.75 1.0 1.25 A
(Internal Trip Point) I
LIM
Grounded 0.4 A
V
SHDNH
Shutdown Pin High ● 1.8 V
V
SHDNL
Shutdown Pin Low 0.5 V
V
SELH
Select Pin High ● 1.5 V
V
SELL
Select Pin Low ● 0.8 V
I
SHDN
Shutdown Pin Bias Current V
SHDN
= 5V ● 920 µA
V
SHDN
= 2V ● 3 µA
V
SHDN
= 0V ● 0.1 1 µA
I
SEL
Select Pin Bias Current 0V < V
SEL
< 5V ● 13 µA
ELECTRICAL CHARACTERISTICS
T
A
= 25°C, V
IN
= 2V unless otherwise noted.
Note 1: Hysteresis specified is DC. Output ripple may be higher if
output capacitance is insufficient or capacitor ESR is excessive. See
applications section.
The
● denotes specifications which apply over the 0°C to 70°C
temperature range.
1
2
3
4
8
7
6
5
TOP VIEW
GND
SEL
SHDN
SENSE
PGND
SW
V
IN
I
LIM
N8 PACKAGE
8-LEAD PLASTIC DIP
S8 PACKAGE
8-LEAD PLASTIC SOIC
3
LT1300
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
No-Load Battery Current
Total Quiescent Current
in Shutdown
SWITCH CURRENT (A)
0 0.1
V
CESAT
(mV)
150
125
200
175
250
225
0.8 0.9
LT1300 G5
100
75
50
25
0
0.2 0.3
0.4 0.5
0.6 0.7
1
Maximum Output Current
vs Input Voltage
Maximum Output Current
vs Input Voltage
200µs/DIV
0
Transient Response
V
IN
= 2V, V
OUT
= 5V
Startup Response
V
CESAT
vs I
SW
Efficiency
Shutdown Pin Bias Current
V
OUT
100mV/DIV
AC COUPLED
V
OUT
1V/DIV
V
SHDN
10V/DIV
LT1300 G8
SHUTDOWN VOLTAGE (V)
0
0
SHUTDOWN CURRENT (µA)
2
6
8
10
20
14
2
4
5
LT1300 G4
4
16
18
12
13
6
7
8
T
A
= 25°C
LOAD CURRENT (mA)
1
74
EFFICIENCY (%)
76
78
80
82
10 100 1000
LT1300 G1
72
70
68
66
84
86
88
V
IN
= 3V
V
IN
= 2V
V
IN
= 2.5V
V
OUT
= 3.3V
L = 10µH
INPUT VOLTAGE (V)
1.4
INPUT CURRENT (µA)
150
145
160
155
170
165
3.02.8
LT1300 G2
140
135
130
125
120
1.81.6
2.22.0
2.62.4
3.43.2
V
OUT
= 5V
V
OUT
= 3.3V
INPUT VOLTAGE (V)
0
I
SHDN
+ I
VIN
+ I
SENSE
(µA)
40
50
60
8
LT1300 G3
30
20
0
2
4
6
10
80
70
1
3
5
7
INPUT VOLTAGE (V)
1.5
OUTPUT CURRENT (mA)
500
600
700
34
LT1300 G6
400
300
2
2.5
3.5 4.5
200
100
0
V
OUT
= 5V,
I
LIM
FLOATING
L = 22µH
COILCRAFT
DO3316-223
L = 10µH
COILCRAFT
DO1608-103
INPUT VOLTAGE (V)
1.5
0
LOAD CURRENT (mA)
100
300
400
500
2.5
3
3.5
900
LT1300 G7
200
2
600
700
800
L = 10µH
V
OUT
= 3.3V
I
LIM
FLOATING
V
OUT
= 5V
R
LOAD
= 20Ω
LT1300 G9
500µs/DIV
200mA
I
LOAD
P1-P3P4-P6P7-P8

LT1300CS8#TRPBF

Mfr. #:
Buy LT1300CS8#TRPBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Switching Voltage Regulators Micropower High Efficiency 3.3/5V Step-Up DC/DC Converter
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet