NCP1589D Datasheet, PDF (4/8 Pages) ON Semiconductor – Low Voltage Synchronous Buck Controller

NCP1589D
ELECTRICAL CHARACTERISTICS (0°C < T_A < 95°C; 4.5 V < [BOOT−LX] < 13.2 V, 4.5 V < BOOT < 30 V, 0 V < LX < 21 V,
C_TG = C_BG = 1.0 nF, for min/max values unless otherwise noted.)
Characteristic
Conditions
Min
Typ
Max
Unit
V_CC Input Voltage Range
BOOT Voltage Range
dV/dt on V_CC
VREF AND ERROR AMPLIFIER
4.5
13.2 V wrt LX
4.5
−10
13.2
V
30
V
10
V/ms
Reference Voltage
Output Voltage Accuracy
Vref
0.8
Reference and Error Amplifier Excluding
−1.0
External Resistive Divider Tolerance
V
1.0
%
SUPPLY CURRENT
V_CC Quiescent Supply Current
BOOT Quiescent Current
No Switching, V_CC = 13.2 V
No Switching
2.5
3.8
mA
0.1
100
mA
UNDERVOLTAGE LOCKOUT
V_CC UVLO Threshold
V_CC UVLO Threshold
V_CC UVLO Hysteresis
SWITCHING REGULATOR
V_CC Rising
V_CC Falling
V_CC Rising or V_CC Falling
4.4
V
4.0
V
400
mV
Ramp Slope
Ramp−Amplitude Voltage
Minimum Duty Cycle
Maximum Duty Cycle
LG Minimum on Time
0.5
V/ms
1.50
V
0
%
70
83
92
%
200
350
ns
ERROR AMPLIFIER
Open Loop DC Gain (Note 1)
Output Source Current
Output Sink Current
Unity Gain Bandwidth (Note 1)
Disable Threshold
Output Source Current During Disable
V_fb < 0.8 V
V_fb > 0.8 V
80
120
dB
2.0
mA
2.0
15
MHz
0.7
0.8
0.9
V
10
40
mA
GATE DRIVERS
Upper Gate Source
BOOT − LX = 5 V
1.5
A
Upper Gate Sink
BOOT − LX = 5 V
1.8
W
Lower Gate Source
V_CC = 5 V
1.5
A
Lower Gate Sink
V_CC = 5 V
1.2
W
UG Falling to LG Rising Delay Tdead1
(Note 1)
V_CC = 12 V, UG−LX < 1.0 V, LG > 1.0 V
Only Valid for CCM Operating Mode
20
30
ns
LG Falling to UG Rising Delay Tdead2
(Note 1)
V_CC = 12 V, LG < 1.0 V, UG > 1.0 V
Only Valid for CCM Operating Mode
20
30
ns
UG Internal Resistor to LX
LX Internal Resistor to GND
Unbiased, BOOT − LX = 0
45
kW
45
kW
SOFT−START
Soft−Start Time
Enable to Soft−Start Delay (Note 1)
V_CC > 4.5 V, COMP w Disable Threshold
V_CC > 4.5 V, COMP Rises and Crosses
Disable Threshold
2.0
2.6
ms
500
ms
1. Guaranteed by design but not tested in production.
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