LM3670MF-18 Datasheet, PDF (8/25 Pages) Texas Instruments – LM3670 Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits

LM3670
SNVS250E – NOVEMBER 2004 – REVISED FEBRUARY 2013
Typical Performance Characteristics (continued)
(unless otherwise stated: V_IN= 3.6V, V_OUT= 1.8V)
Frequency vs. Temperature
1010
1000 ^ILOAD ^{= 150 mA}
990
980
V_IN = 5.5V
970
V_IN = 3.6V
960
950
V_IN = 2.5V
940
930
920
910
900
890
880
870
860
850
840
-40-30 -20 _-10 0 10 20 30 40 50 60 70 80
R_DSON vs. V_IN
P & N Channel
0.8
N FET
P FET
0.7
0.6
TA = 85°C
TA = 25°C
TA = -40°C
0.5
0.4
0.3
0.2
0.1
2.5 3 3.5 4 4.5 5
TEMPERATURE (°C)
V_IN (V)
Figure 11.
Figure 12.
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5.5
Line Transient
(V_IN = 2.6V to 3.6V, I_LOAD = 100 mA)
IOUT = 100 mA
VIN rise time = 10 ms
VIN = 2.6V
VIN = 3.6V
Line Transient
(V_IN = 3.6V to 4.6V , I_LOAD = 100 mA)
VIN = 4.6V
VIN = 3.6V
VOUT = 1.8V
(20 mV/Div)
VOUT = 1.8V
(20 mV/Div)
TIME (200 ms/DIV)
Figure 13.
Load Transient
I_LOAD = 3mA to 280mA
VOUT (50 mV/Div)
ILOAD = 280 mA
ILOAD = 3 mA
TIME (100 Ps/DIV)
Figure 15.
TIME (100 ms/DIV)
Figure 14.
Load Transient
I_LOAD = 0mA to 70mA
VOUT (50 mV/Div)
Inductor Current = 200 mA/Div
ILOAD = 70 mA
ILOAD = 0 mA
TIME (100 Ps/DIV)
Figure 16.
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