LTC3670_15 Datasheet, PDF (2/12 Pages) Linear Technology – Monolithic 400mA Buck Regulator with Dual 150mA

LTC3670
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2, 3)
V_IN, ENBUCK, ENLDO1, ENLDO2,
PGOOD .................................................... –0.3V to 6V
SW, BUCKFB, LDO1_FB, LDO2_FB,
LDO1, LDO2...............................–0.3V to (V_IN + 0.3V)
I_SW .......................................................................600mA
I_LDO1, I_LDO2 ..........................................................250mA
I_PGOOD ....................................................................40mA
Junction Temperature ........................................... 125°C
Operating Temperature Range.................. –40°C to 85°C
Storage Temperature Range................... –65°C to 125°C
PIN CONFIGURATION
TOP VIEW
SW 1
GND 2
ENLD01 3
ENLD02 4
ENBUCK 5
BUCKFB 6
12 V_IN
11 LDO2
10 LDO1
13
9 LDO1_FB
8 LDO2_FB
7 PGOOD
DDB PACKAGE
12-LEAD (3mm × 2mm) PLASTIC DFN
T_JMAX = 125°C, θ_JA = 76°C/W, θ_JC = 13.5°C/W
EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3670EDDB#PBF
LTC3670EDDB#TRPBF LDBY
12-Lead (3mm × 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 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 noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
V_IN
Input Voltage Range
l 2.5
5.5
V_UVLO
Undervoltage Lockout Threshold
Undervoltage Lockout Hysteresis
V_IN Rising
2.2
2.3
18
100
I_Q
V_IN Quiescent Current, No Load
All Outputs Enabled
Buck Enabled Only
Buck Enabled Only, in Dropout
One LDO Enabled Only
Shutdown
(Note 4)
V_BUCKFB = 0.9V
V_BUCKFB = 0.9V
V_BUCKFB = 0V
V_ENBUCK = V_ENLDO1 = V_ENLDO2 = 0V
70
110
38
60
700 1100
22
35
1
ENBUCK, ENLDO1, ENLDO2 Pin Thresholds
V_IL
Logic Low Voltage
V_IH
Logic High Voltage
l
0.4
l 1.2
ENBUCK, ENLDO1, ENLDO2 Pin Pull-Down
4
Resistance
R_PGOOD
PGOOD Pin Logic Low Output Resistance
PGOOD Pin Hi-Z Leakage
PGOOD Threshold on Feedback Voltages of
Enabled Regulators
V_PGOOD = 6V
(Note 5)
30
1
92
UNITS
V
V
mV
μA
μA
μA
μA
μA
V
V
MΩ
Ω
μA
%
3670f
2