LM3674_15 Datasheet, PDF (5/26 Pages) Texas Instruments – LM3674 2-MHz, 600-mA Step-Down DC-DC Converter in SOT-23

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LM3674
SNVS405G – DECEMBER 2005 – REVISED APRIL 2015
6.6 Electrical Characteristics
Typical limits are T_A = 25°C; unless otherwise noted, specifications apply to the LM3674 with V_IN = EN = 3.6 V^(1)(2)(3)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
Feedback voltage⁽⁴⁾⁽⁵⁾
I_O = 10 mA, −30°C ≤ T_J ≤ 125°C
–4%
4%
V_FB
Line regulation
2.7 V ≤ V_IN ≤ 5.5 V, I_O = 100 mA
0.083
%/V
V_REF
Load regulation
Internal reference voltage
100 mA ≤ I_O ≤ 600 mA, V_IN = 3.6 V
See ⁽⁶⁾
0.0010
0.5
%/mA
V
I_SHDN
Shutdown supply current
EN = 0 V
EN = 0 V, –30°C ≤ T_J ≤ 125°C
0.01
µA
1
No load, device is not switching (FB = 0 V)
300
I_Q
DC bias current into V_IN
No load, device is not switching (FB = 0 V)
–30°C ≤ T_J ≤ 125°C
µA
600
R_{DSON (P)} Pin-to-pin resistance for PFET I_SW = 200 mA
380
500 mΩ
R_{DSON (N)}
I_LIM
Pin-to-pin resistance for NFET
Switch peak current limit
I_SW = 200 mA
Open loop⁽⁷⁾
Open loop⁽⁷⁾, –30°C ≤ T_J ≤ 125°C
250
400 mΩ
1020
mA
830
1200
V_IH
Logic high input
–30°C ≤ T_J ≤ 125°C
1
V
V_IL
Logic low input
–30°C ≤ T_J ≤ 125°C
0.4
V
I_EN
Enable (EN) input current
–30°C ≤ T_J ≤ 125°C
0.01
µA
1
F_OSC
Internal oscillator frequency
PWM mode
PWM mode, −30°C ≤ T_J ≤ 125°C
2
MHz
1.6
2.6
(1) All voltages are with respect to the potential at the GND pin.
(2) Minimum and maximum limits are specified by design, test, or statistical analysis. Typical numbers represent the most likely values.
(3) The parameters in the Electrical Characteristics are tested at V_IN = 3.6 V unless otherwise specified. For performance curves over the
input voltage range, see Typical Characteristics.
(4) ADJ configured to 1.5-V output.
(5) For V_OUT < 2.5 V, V_IN = 3.6 V; for V_OUT ≥ 2.5 V, V_IN = V_OUT + 1.
(6) For the ADJ version the resistor dividers should be selected such that at the desired output voltage, the voltage at the FB pin is 0.5 V.
(7) See Typical Characteristics for closed loop data and its variation with regards to supply voltage and temperature. Electrical
Characteristics reflect open loop data (FB = 0 V and current drawn from the SW pin ramped up until cycle-by-cycle current limit is
activated). Closed-loop current limit is the peak inductor current measured in the application circuit by increasing output current until
output voltage drops by 10%.
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