Datasheet

2
LT1301
ABSOLUTE MAXIMUM RATINGS
W
WW
U
PACKAGE/ORDER INFORMATION
W
U
U
V
IN
Voltage .............................................................. 10V
SW1 Voltage ............................................................ 20V
Sense Voltage .......................................................... 20V
Shutdown Voltage ................................................... 10V
Select Voltage .......................................................... 10V
I
LIM
Voltage ............................................................ 0.5V
Maximum Power Dissipation ............................. 500mW
Operating Temperature Range
LT1301C................................................... 0°C to 70°C
LT1301I .................................................. 40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
S8 PART MARKING
1301
1301I
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 ● 11.52 12.00 12.48 V
V
SEL
= 0V ● 4.75 5.00 5.25 V
Output Referred V
SEL
= 5V (Note 1) ● 50 100 mV
Comparator Hysteresis V
SEL
= 0V (Note 1) ● 22 50 mV
Oscillator Frequency Current Limit not Asserted. 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 ● 820 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.
The ● denotes specifications which apply over the 0°C to 70°C
temperature range.
ORDER PART
NUMBER
Note 1: Hysteresis specified is DC. Output ripple may be higher if
output capacitance is insufficient or capacitor ESR is excessive.
See operation section.
LT1301CN8
LT1301CS8
LT1301IS8
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
T
JMAX
= 100°C, θ
JA
= 150°C/W