Datasheet

2
LT1610
ABSOLUTE MAXIMUM RATINGS
W
WW
U
PACKAGE/ORDER INFORMATION
W
U
U
T
JMAX
= 125°C, θ
JA
= 160°C/W
T
JMAX
= 125°C, θ
JA
= 120°C/W
(Note 1)
V
IN
Voltage ................................................................ 8V
SW Voltage ............................................... –0.4V to 30V
FB Voltage ..................................................... V
IN
+ 0.3V
V
C
Voltage ................................................................ 2V
COMP Voltage .......................................................... 2V
Current into FB Pin .............................................. ±1mA
SHDN Voltage ............................................................ 8V
Consult factory for Military grade parts.
Maximum Junction Temperature ......................... 125°C
Operating Temperature Range (Note 1)
Commercial ............................................. 0°C to 70°C
Extended Commercial (Note 2).......... –40°C to 85°C
Industrial ........................................... –40°C to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
ORDER PART
NUMBER
LT1610CS8
LT1610IS8
S8 PART MARKING
1610
1610I
ORDER PART
NUMBER
LT1610CMS8
MS8 PART MARKING
LTDT
1
2
3
4
V
C
FB
SHDN
PGND
8
7
6
5
COMP
GND
V
IN
SW
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
1
2
3
4
8
7
6
5
TOP VIEW
V
C
FB
SHDN
PGND
COMP
GND
V
IN
SW
S8 PACKAGE
8-LEAD PLASTIC SO
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Operating Voltage 0.9 1 V
Maximum Operating Voltage 8V
Feedback Voltage ● 1.20 1.23 1.26 V
Quiescent Current V
SHDN
= 1.5V, Not Switching 30 60 µA
Quiescent Current in Shutdown V
SHDN
= 0V, V
IN
= 2V 0.01 0.5 µA
V
SHDN
= 0V, V
IN
= 5V 0.01 1.0 µA
FB Pin Bias Current ● 27 80 nA
Reference Line Regulation 1V ≤ V
IN
≤ 2V (25°C, 0°C) 0.6 1 %/V
1V ≤ V
IN
≤ 2V (70°C) 2 %/V
2V ≤ V
IN
≤ 8V (25°C, 0°C) 0.03 0.15 %/V
2V ≤ V
IN
≤ 8V (70°C) 0.2 %/V
Error Amp Transconductance ∆I = 2µA25µmhos
Error Amp Voltage Gain 100 V/V
Switching Frequency ● 1.4 1.7 2 MHz
Maximum Duty Cycle 77 80 95 %
● 75 95 %
E
LECTR
IC
AL C CHARA TERIST
ICS
The ● denotes specifications which apply over the specified temperature
range, otherwise specifications are at T
A
= 25°C. Commercial grade 0°C to 70°C, V
IN
= 1.5V, V
SHDN
= V
IN
, unless otherwise noted.
(Note 2)