Datasheet

LTC3446
2
3446ff
pin conFiguraTionabsoluTe MaxiMuM raTings
V
IN
, LV
IN
to GND ......................................... –0.3V to 6V
MODESEL, ENBUCK, ENLDO1,
ENLDO2 to GND .......................................... –0.3V to 6V
BUCKFB to GND .......................................... –0.3V to 6V
LV
FB1
, LV
FB2
to GND .................................... –0.3V to 6V
I
TH
to GND ..... –0.3V to the Lesser of (V
IN
+ 0.3V) or 3V
SW to GND ......–0.3V to the Lesser of (V
IN
+ 0.3V) or 6V
LV
OUT1
, LV
OUT2
to GND .......... –0.3V to the Lesser of (LV
IN
+ 0.3V) or 6V
PGOOD to GND ............................................ –0.3V to 6V
LV
OUT1
, LV
OUT2
Short-Circuit
to GND Duration ............................................... Indefinite
Operating Junction Temperature Range
(Note 2) .................................................. –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
(Note 1)
1
2
3
4
5
6
7
14
13
12
11
10
9
8
SW
ENBUCK
BUCKFB
ENLDO1
LV
FB1
LV
FB2
ENLDO2
MODESEL
V
IN
I
TH
PGOOD
LV
OUT1
LV
IN
LV
OUT2
TOP VIEW
DE PACKAGE
14-LEAD (4mm × 3mm) PLASTIC DFN
15
T
JMAX
= 125°C, θ
JA
= 43°C/W
EXPOSED PAD (PIN 15) IS GND, MUST BE SOLDERED TO PCB
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC3446EDE#PBF LTC3446EDE#TRPBF 3446 14-Lead (4mm × 3mm) Plastic DFN –40°C to 125°C
LTC3446IDE#PBF LTC3446IDE#TRPBF 3446 14-Lead (4mm × 3mm) Plastic DFN –40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Input Voltage Range (Note 3)
●
2.7 5.5 V
V
UVLO
V
IN
Undervoltage Lockout Threshold
V
IN
Undervoltage Lockout Hysteresis
V
IN
Rising
●
2.37
10
2.5
30
V
mV
I
Q
V
IN
Quiescent Current (Note 4)
Buck Enabled Only, Not Sleeping
Buck Enabled Only, Sleeping
One LDO Enabled Only
All Three Outputs Enabled, Buck Not Sleeping
All Three Outputs Enabled, Buck Sleeping
Shutdown
V
BUCKFB
= 0V, I
SW
= 0mA
V
BUCKFB
= 1V, I
SW
= 0mA
V
LVIN
= 1.5V, 10µA LDO Output Load
V
BUCKFB
= 0V, I
SW
= 0mA, V
LVIN
= 1.5V,
10µA Output Load on Each LDO
V
BUCKFB
= 1V, I
SW
= 0mA, V
LVIN
= 1.5V,
10µA Load on Each LDO
V
ENBUCK
= 0V, V
ENLDO1
= 0V, V
ENLDO2
= 0V
310
50
75
400
140
500
75
100
600
210
1
µA
µA
µA
µA
µA
µA
elecTrical characTerisTics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 3.6V unless otherwise specified. (Note 2)