Datasheet

2
LTC3490
3490fa
Supply Voltage (V
IN
) ................................... –0.3V to 6V
Input Voltages (CTRL/SHDN, CELLS) ......... – 0.3V to 6V
Output Voltages (CAP, LED, SW)................ –0.3V to 6V
ABSOLUTE AXI U RATI GS
WWWU
(Note 1)
Operating Temperature Range (Note 2) .. –40°C to 85°C
Storage Temperature Range ................. –65°C to 125°C
Lead Temperature (Soldering, 10 sec, S8) .......... 300°C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Input Supply Range 1 3.2 V
V
IN(START)
Minimum Start-Up Voltage (Note 3) 0.9 1 V
I
LED(MAX)
LED Drive Current V
CTRL/SHDN
= V
IN
, DD Package
25°C to 85°C 330 350 370 mA
–40°C to <25°C 310 350 385 mA
V
CTRL/SHDN
= V
IN
, S8 Package
25°C to 85°C 337 350 363 mA
–40°C to <25°C 325 345 365 mA
I
LED(SHDN)
LED Drive Current in Shutdown V
CTRL/SHDN
= 0V 0.1 1 µA
V
LED
Output Compliance Voltage ● 2.8 4 V
V
LED(OVL)
Output Voltage Overvoltage Limit Open LED ● 4.2 4.7 V
I
IN(SHDN)
Input Current, Shutdown V
CTRL/SHDN
= 0V, Excluding Switch Leakage 20 50 µA
I
IN(ACTIVE)
Input Current, Active Excluding Load Power 20 30 mA
f
SW
Switching Frequency ● 1.0 1.3 1.6 MHz
I
L(NMOS)
Leakage Current, NMOS Switch 0.1 µA
R
ON(NMOS)
On-Resistance, NMOS Switch 0.1 Ω
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are T
A
= 25°C. V
IN
= 2.5V unless otherwise specified.
ELECTRICAL CHARACTERISTICS
LTC3490EDD
LBRQ
T
JMAX
= 125°C, θ
JA
= 43°C/ W (NOTE 4)
EXPOSED PAD (PIN 9) IS GND
MUST BE SOLDERED TO PCB (NOTE 5)
LTC3490ES8
3490
T
JMAX
= 125°C, θ
JA
= 150°C/ W (NOTE 4)
TOP VIEW
9
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
5
6
7
8
4
3
2
1CELLS
V
IN
SW
GND
CTRL/SHDN
LOBAT
CAP
LED
1
2
3
4
8
7
6
5
TOP VIEW
CTRL/SHDN
LOBAT
CAP
LED
CELLS
V
IN
SW
GND
S8 PACKAGE
8-LEAD PLASTIC SO
WU
U
PACKAGE
/
O
RDER I FOR ATIO
ORDER PART NUMBER
Consult LTC Marketing for parts specified with wider operating temperature ranges.
DD PART MARKING
ORDER PART NUMBER S8 PART MARKING
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/