LTC3672B-1_15 Datasheet, PDF (2/12 Pages) Linear Technology – Monolithic Fixed-Output 400mA Buck Regulator with Dual

LTC3672B-1
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2, 3)
V_IN ............................................................... –0.3V to 6V
V_IN1, BUCKOUT, ENALL, SW,
LDO2 ...........–0.3V to the lesser of (V_IN + 0.3V) or 6V
LDO1 ............. –0.3V to the lesser of (V_IN1 + 0.3V) or 6V
Junction Temperature ........................................... 125°C
Operating Temperature Range...................... –40 to 85°C
Storage Temperature Range....................... –65 to 125°C
PIN CONFIGURATION
TOP VIEW
SW 1
8 V_IN
GND 2
7 LDO2
9
ENALL 3
6 LDO1
BUCKOUT 4
5 V_IN1
DC PACKAGE
8-LEAD (2mm s 2mm) PLASTIC DFN
T_JMAX = 125°C, θ_JA = 102°C/W, θ_JC = 20°C/W
EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
LTC3672BEDC-1#PBF
LTC3672BEDC-1#TRPBF LCWH
8-Lead (2mm × 2mm) Plastic DFN
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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/
TEMPERATURE RANGE
–40°C to 85°C
ELECTRICAL CHARACTERISTICS The ● 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 noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
V_IN
V_UVLO
Input Voltage Range
V_IN Undervoltage Lockout Threshold
Undervoltage Lockout Hysteresis
V_IN Rising
● 2.9
5.5
V
1.7
2
V
12
100
mV
I_Q,VIN
V_IN Quiescent Current
All Outputs Enabled, No Load
Shutdown
I_Q,VIN1
V_IN1 Quiescent Current
All Outputs Enabled, No Load
Shutdown
V_IL
ENALL Pin Logic Low Voltage
V_IH
ENALL Pin Logic High Voltage
R_ENALL
ENALL Pin Pulldown Resistance
Synchronous Buck Regulator
(Note 4)
V_BUCKOUT = 1.9V
V_ENALL = 0V
V_IN1 = 1.8V
V_ENALL = 0V
260
400
μA
1
μA
2.3
5
μA
1
μA
●
0.4
V
● 1.2
V
5.5
MΩ
f_OSC
V_BUCKOUT
I_MAXP
I_OUT,BUCK
R_P,BUCK
R_N,BUCK
Oscillator Frequency
Regulated Output Voltage
PMOS Switch Maximum Peak Current (Note 5)
Available Output Current
PMOS Switch On-Resistance
NMOS Switch On-Resistance
1.8 2.25 2.7
MHz
● 1.755 1.8 1.845
V
550
800 1100
mA
400
mA
0.6
Ω
0.7
Ω
3672B1f
2