LTC3670_15 Datasheet, PDF (5/12 Pages) Linear Technology – Monolithic 400mA Buck Regulator with Dual 150mA

LTC3670
TYPICAL PERFORMANCE CHARACTERISTICS (T_A = 25°C unless otherwise noted)
PMOS Switch Maximum Peak
Current vs Temperature
900
V_IN = 5.5V
800
700
V_IN = 4.2V
V_IN = 3.6V
600
V_IN = 2.5V
500
400
300
200
100
0
–50 –30 –10 10 30 50 70 90 110 130
TEMPERATURE (˚C)
3670 G1O
Buck PMOS On-Resistance
1000
900
800
130°C
90°C
700
25°C
600
500
–45°C
400
300
200
100
0
2.5 3 3.5 4 4.5
V_IN (V)
5 5.5
3670 G11
PGOOD Threshold at Any
Feedback Pin
100
99
98
97
96
95
94
90°C
93
130°C
92
91
25°C
90
2.5 3 3.5 4 4.5
V_IN (V)
–45°C
5 5.5
3670 G12
PGOOD Pin Pull-Down Resistance
80
PGOOD PIN SINKING 2mA
70
60
50
130°C
90°C
40
25°C
30
20
–45°C
10
0
2.5 3 3.5 4 4.5
V_IN (V)
5 5.5
3670 G13
Front Page Application Efficiency
100
FRONT PAGE APPLICATION CIRCUIT
95 ^{WITH ONLY THE BUCK ENABLED.}
INDUCTOR: COILCRAFT EPL2014-472ML
90 ^{VOUT = 1.2V}
V_IN = 2.5V
85
80
V_IN = 3.6V
75
70
V_IN = 5.5V
65
60
1
10
100
LOAD CURRENT (mA)
1000
3670 G14
3670f
5