NCP1521B Datasheet, PDF (4/14 Pages) ON Semiconductor – 1.5 MHz, 600 mA Step−Down DC−DC Converter

NCP1521B
ELECTRICAL CHARACTERISTICS (Typical values are referenced to T_A = +25°C, Min and Max values are referenced −40°C to +85°C
ambient temperature, unless otherwise noted, operating conditions V_IN = 3.6 V, V_OUT = 1.2 V, unless otherwise noted.)
Pin
VIN PIN
Rating
TSOP UDFN Symbol Min
Typ
Max
Unit
Input Voltage Range
Quiescent Current, PFM No Switching
Standby Current, EN Low
Under Voltage Lockout (V_IN Falling)
EN PIN
1
3
V_IN
2.7
−
5.5
V
1
3
I_{q ON}
−
30
45
mA
1
3
I_{q OFF}
−
0.2
1.5
mA
1
3
V_UVLO
2.2
2.4
2.55
V
Positive going Input High Voltage Threshold, EN0 Signal
Negative going Input High Voltage Threshold, EN0 Signal
EN High Input Current, EN = 3.6 V
OUTPUT
3
1
V_IH
1.2
−
−
V
3
1
V_IL
−
−
0.4
V
3
1
I_ENH
−
2.0
−
mA
Output Voltage Accuracy (Note 6)
Ambient Temperature
Overtemperature Range
V_OUT
%
−
$1.0
−
−3.0 $2.0
3.0
Minimum Output Voltage
Maximum Output Voltage
Output Voltage load regulation Overtemperature
I_OUT = 100 mA to 600 mA
V_OUT
V_OUT
V_OUT
−
0.9
−
−
3.3
−
−
0.0005
−
−
−
−
V
V
%/mA
Load Transient Response, Rise/Falltime 1 ms
10 mA to 100 mA Load Step
200 mA to 600 mA Load Step
V_OUT
mV
−
35
−
−
80
−
Output Voltage Line Regulation, I_OUT = 100 mA,
V_IN = 2.7 V to 5.5 V
Line Transient Response, I_OUT = 100 mA,
3.6 V to 3.0 V Line Step (Falltime=50 ms)
V_OUT
%
−
0.05
−
V_OUT
mV_PP
−
6
−
Output Voltage Ripple, I_OUT = 300 mA (PWM Mode)
Output Voltage Ripple, I_OUT = 0 mA (PFM Mode)
Peak Inductor Current
Oscillator Frequency
Duty Cycle
V_OUT
−
2.0
−
mV
V_OUT
−
8.0
−
mV
5
5
I_LIM
−
1200
−
mA
5
5
F_OSC
1.3
1.5
1.8
MHz
5
5
−
−
−
100
%
Soft−Start Time
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
POWER SWITCHES
T_START
−
320
500
ms
T_SD
−
160
−
°C
T_SDH
−
25
−
°C
P−Channel On−Resistance
RLxH
−
400
−
mW
N−Channel On−Resistance
RLxL
−
400
−
mW
P−Channel Leakage Current
I_LeakH
−
0.05
−
mA
N−Channel Leakage Current
I_LeakL
−
0.01
−
mA
6. The overall output voltage tolerance depends upon the accuracy of the external resistor (R1, R2).
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