LM3670MF-18 Datasheet, PDF (5/25 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
Electrical Characteristics
Limits in standard typeface are for T_J = 25°C. Limits in boldface type apply over the full operating junction temperature range
(−40°C ≤ T_J ≤ +125°C). Unless otherwise noted V_IN = 3.6V, V_OUT = 1.8V, I_O = 150mA, EN = V_IN
Symbol
Parameter
Condition
Min
Typ
Max
Units
V_IN
Input Voltage Range
(1)
2.5
5.5
V
V_OUT
Fixed Output Voltage: 1.2V
2.5V ≤ V_IN ≤ 5.5V
I_O = 10 mA
-2.0
+4.0
%
2.5V ≤ V_IN ≤ 5.5V
-4.5
0 mA ≤ I_O ≤ 150 mA
+4.0
Fixed Output Voltage: 1.5V
2.5V ≤ V_IN ≤ 5.5V
I_O = 10 mA
-2.5
+4.0
%
2.5V ≤ V_IN ≤ 5.5V
-5.0
0 mA ≤ I_O ≤ 350 mA
+4.0
Fixed Output Voltage: 1.6V,
1.875V
2.5V ≤ V_IN ≤ 5.5V
I_O = 10 mA
-2.5
+4.0
%
2.5V ≤ V_IN ≤ 5.5V
-5.5
0 mA ≤ I_O ≤ 350 mA
+4.0
Fixed Output Voltage: 1.8V
2.5V ≤ V_IN ≤ 5.5V
I_O = 10 mA
-1.5
+3.0
%
2.5V ≤ V_IN ≤ 5.5V
0 mA ≤ I_O ≤ 350 mA
−4.5
+3.0
Fixed Output Voltage: 2.5V, 3.3V 3.6V ≤ V_IN ≤ 5.5V
I_O = 10 mA
-2.0
+4.0
%
3.6V ≤ V_IN ≤ 5.5V
-6.0
0 mA ≤ I_O ≤ 350 mA
+4.0
Adjustable Output Voltage
(2)
2.5V ≤ V_IN ≤ 5.5V
I_O = 10 mA
-2.5
+4.5
%
2.5V ≤ V_IN ≤ 5.5V
-4.0
0 mA ≤ I_O ≤ 150 mA
+4.5
Line_reg
Line Regulation
2.5V ≤ V_IN ≤ 5.5V
I_O = 10 mA
0.26
%/V
Load_reg
Load Regulation
150 mA ≤ I_O ≤ 350 mA
0.0014
%/mA
V_REF
Internal Reference Voltage
0.5
V
I_{Q_SHDN}
Shutdown Supply Current
T_A=85ºC
0.1
1
µA
I_Q
DC Bias Current into V_IN
No load, device is not switching
(V_OUT forced higher than
programmed output voltage)
15
30
µA
V_UVLO
Minimum V_IN below which V_OUT
will be disabled
2.4
V
R_{DSON (P)}
R_{DSON (N)}
I_{LKG (P)}
I_{LKG (N)}
I_LIM
η
Pin-Pin Resistance for PFET
Pin-Pin Resistance for NFET
P Channel Leakage Current
N Channel Leakage Current
Switch Peak Current Limit
Efficiency
(V_IN = 3.6V, V_OUT = 1.8V)
V_IH
Logic High Input
V_IL
Logic Low Input
V_IN=V_GS=3.6V
V_IN=V_GS=3.6V
V_DS=5.5V
V_DS=5.5V
I_LOAD = 1 mA
I_LOAD = 10 mA
I_LOAD = 100 mA
I_LOAD = 200 mA
I_LOAD = 300 mA
I_LOAD = 350 mA
360
690
mΩ
250
660
mΩ
0.1
1
µA
0.1
1.5
µA
400
620
750
mA
91
94
94
%
94
92
90
1.3
V
0.4
V
(1) The input voltage range recommended for the specified output voltages are given below: V_IN = 2.5V to 5.5V for 0.7V ≤ V_OUT <
1.875VV_IN = ( V_OUT + V_{DROP OUT}) to 5.5V for 1.875 ≤ V_OUT≤ 3.3VWhere V_{DROP OUT} = I_LOAD * (R_{DSON (P)} + R_INDUCTOR)
(2) Output voltage specification for the adjustable version includes tolerance of the external resistor divider.
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