Datasheet

LT8410/LT8410-1
3
84101fb
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LT8410E/LT8410E-1 are guaranteed to meet performance
specifications from 0°C to 125°C junction temperature. Specifications over
the –40°C to 125°C operating junction temperature range are assured by
design, characterization and correlation with statistical process controls.
The LT8410I/LT8410I-1 are guaranteed over the full –40°C to 125°C
operating junction temperature range.
Note 3: See the Applications Information section for more information.
Note 4: Start-up mode occurs when V
OUT
is less than V
FBP
• 64/3.
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3V, V
SHDN
= V
CC
unless otherwise noted. (Note 2)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Switch V
CESAT
LT8410, I
SW
= 10mA
LT8410-1, I
SW
= 4mA
150
100
mV
mV
Switch Leakage Current V
SW
= 5V 0 1 µA
Schottky Forward Voltage I
DIODE
= 10mA 650 850 mV
Schottky Reverse Leakage V
CAP
– V
SW
= 5
V
CAP
– V
SW
= 40
0
0
0.5
1
µA
µA
PMOS Disconnect Current Limit LT8410
LT8410-1
14
2.5
19
4
25
5
mA
mA
PMOS Disconnect V
CAP
– V
OUT
I
OUT
= 1mA 50 mV
V
OUT
Resistor Divider Ratio
l
31.6 31.85 32.2
FBP Pin Bias Current V
FBP
= 0.5V, Current Flows Out of Pin
l
1.3 30 nA
SHDN Minimum Input Voltage High SHDN Rising
l
1.20 1.30 1.45 V
SHDN Input Voltage High Hysteresis 60 mV
SHDN Hysteresis Current
(Note 3)
0.08 0.1 0.14 µA
SHDN Input Voltage Low 0.3 V
SHDN Pin Bias Current V
SHDN
= 3V
V
SHDN
= 16V
0
2
1
3
µA
µA
TYPICAL PERFORMANCE CHARACTERISTICS
T
A
= 25°C, unless otherwise noted.
Switching Frequency
vs Load Current Load Regulation V
OUT
vs FBP Voltage
LOAD CURRENT (mA)
0
SWITCHING FREQUENCY (kHz)
1000
800
600
200
400
0
8410-1 G01
321
V
CC
= 3.6V
V
OUT
= 16V
FIGURE 4 CIRCUIT
LOAD CURRENT (mA)
0
OUTPUT VOLTAGE CHANGE (%)
0.6
0.4
0.2
0
–0.4
–0.2
–0.6
8410-1 G02
321
V
CC
= 3.6V
V
OUT
= 16V
FIGURE 4 CIRCUIT
FBP VOLTAGE (V)
0
OUTPUT VOLTAGE (V)
50
40
30
10
20
0
8410-1 G03
21 1.50.5