LTC3446 Datasheet, PDF (2/20 Pages) Linear Technology – Monolithic Buck Regulator with Dual VLDO Regulators

LTC3446
ABSOLUTE MAXIMUM RATINGS
(Note 1)
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 Temperature Range (Note 2)
LTC3446EDE ........................................ –40°C to 85°C
LTC3446IDE ....................................... –40°C to 125°C
Junction Temperature (Note 1) ........................... 125°C
Storage Temperature Range.................. –65°C to 125°C
PIN CONFIGURATION
TOP VIEW
MODESEL 1
V_IN 2
I_TH 3
PGOOD 4
LV_OUT1 5
LV_IN 6
LV_OUT2 7
14 SW
13 ENBUCK
12 BUCKFB
15
11 ENLDO1
10 LV_FB1
9 LV_FB2
8 ENLDO2
DE PACKAGE
14-LEAD (4mm × 3mm) PLASTIC DFN
T_JMAX = 125°C, θ_JA = 35°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 85°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/
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)
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 2.5
V
10
30
mV
I_Q
V_IN Quiescent Current (Note 4)
Buck Enabled Only, Not Sleeping
V_BUCKFB = 0V, I_SW = 0mA
Buck Enabled Only, Sleeping
V_BUCKFB = 1V, I_SW = 0mA
One LDO Enabled Only
V_LVIN = 1.5V, 10μA LDO Output Load
All Three Outputs Enabled, Buck Not Sleeping V_BUCKFB = 0V, I_SW = 0mA, V_LVIN = 1.5V,
10μA Output Load on Each LDO
All Three Outputs Enabled, Buck Sleeping
V_BUCKFB = 1V, I_SW = 0mA, V_LVIN = 1.5V,
10μA Load on Each LDO
Shutdown
V_ENBUCK = 0V, V_ENLDO1 = 0V, V_ENLDO2 = 0V
310 500
μA
50
75
μA
75 100
μA
400 600
μA
140 210
μA
1
μA
3446fd
2