Datasheet
LT3461/LT3461A
2
3461af
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Operating Voltage 2.5 V
Maximum Operating Voltage 16 V
Feedback Voltage 1.235 1.255 1.275 V
● 1.225 1.280 V
Feedback Line Regulation 0.005 %/V
FB Pin Bias Current ● 40 100 nA
Supply Current FB = 1.3V, Not Switching 2.8 3.6 mA
SHDN = 0V 0.1 0.5 µA
Switching Frequency (LT3461A) ● 2.1 3.0 3.9 MHz
Switching Frequency (LT3461) ● 1.0 1.3 1.7 MHz
Maximum Duty Cycle (LT3461A) ● 82 %
Maximum Duty Cycle (LT3461) ● 92 %
Switch Current Limit 300 420 600 mA
Switch V
CESAT
I
SW
= 250mA 260 350 mV
Switch Leakage Current V
SW
= 5V 0.01 1 µA
Schottky Forward Voltage I
SCHOTTKY
= 250mA 800 1100 mV
Schottky Reverse Leakage V
OUT
– SW = 40V 0.03 4 µA
SHDN Voltage High 1.5 V
SHDN Voltage Low 0.4 V
SHDN Pin Bias Current 35 50 µA
Input Voltage (V
IN
) .................................................. 16V
V
OUT
, SW Voltage .................................................... 40V
FB Voltage ................................................................. 5V
SHDN Voltage .......................................................... 16V
Operating Ambient
Temperature Range (Note 2) .................. –40°C to 85°C
Maximum Junction Temperature .......................... 125°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Note 1)
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C, V
IN
= 3V, V
SHDN
= 3V, unless otherwise noted.
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ORDER PART
NUMBER
S6 PART MARKING
LTAHG
LTAEB
LT3461AES6
LT3461ES6
T
JMAX
= 125°C,
θ
JA
= 150°C ON BOARD OVER
GROUND PLANE,
θ
JC
= 120°C/W
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT3461E/LT3461AE is guaranteed to meet specifications from
0°C to 70°C. Specifications over the –40°C to 85°C operating temperature
range are assured by design, characterization and correlation with
statistical process controls.
6 V
IN
5 V
OUT
4 SHDN
SW 1
TOP VIEW
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
GND 2
FB 3