LM3670_15 Datasheet, PDF (7/25 Pages) Texas Instruments – LM3670 Miniature Step-Down DC-DC Converter for Ultra Low Voltage Circuits

LM3670
www.ti.com
SNVS250E – NOVEMBER 2004 – REVISED FEBRUARY 2013
Typical Performance Characteristics
(unless otherwise stated: V_IN= 3.6V, V_OUT= 1.8V)
I_Q (Non-switching) vs. V_IN
20
I_Q vs. Temp
0.1
TA = 85°C
TA = 25°C
15
0.05
TA = -40°C
10
2.5 3 3.5 4 4.5 5 5.5
V_IN (V)
Figure 5.
1.83
1.82
V_OUT vs. V_IN
I_OUT = 10 mA
PFM mode
V_IN = 3.6V
1.81
1.80
I_OUT = 150 mA
PWM mode
1.79
1.78
V_IN = 2.5V
V_IN = 3.6V
V_IN = 5.5V
1.77
-40 -20 0 20 40 60 80
TEMPERATURE (°C)
Figure 7.
Efficiency vs. I_OUT
100
95
V_IN = 2.7V
90
85
80
75
V_IN = 5.0V
70
65
60
55
V_IN = 3.7V
50
45
40
10 ^-2 10 ^-1
10 ⁰
10¹ 10²
10 ³
I_LOAD (mA)
Figure 9.
0
-40 -20 0 20 40 60 80
TEMPERATURE (°C)
Figure 6.
V_OUT vs. I_OUT
1.9
1.88
1.86
1.84
PFM Mode
1.82
1.8
PWM Mode
1.78
1.76
1.74
1.72
1.7
0 50 100 150 200 250 300 350
I_LOAD (mA)
Figure 8.
Efficiency vs. V_IN
100
95
I_LOAD = 150 mA
90
I_LOAD = 1 mA
85
I_LOAD = 300 mA
80
75
70
2.5 3 3.5 4 4.5 5 5.5 6
V_IN (V)
Figure 10.
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