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NCP1422 Datasheet(PDF) 4 Page - ON Semiconductor

Part No. NCP1422
Description  800 mA Sync−Rect PFM Step−Up DC−DC Converter with True−Cutoff and Ring−Killer
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCP1422 Datasheet(HTML) 4 Page - ON Semiconductor

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NCP1422
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ELECTRICAL CHARACTERISTICS (VOUT = 3.3 V, TA = 25°C for typical value, −40°C v TA v 85°C for min/max values unless
otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
Operating Voltage
VIN
1.0
5.0
V
Output Voltage Range
VOUT
1.5
5.0
V
Reference Voltage
(VOUT = 3.3 V, ILOAD = 0 mA, CREF = 200 nF, TA = 25°C)
VREF_NL
1.183
1.200
1.217
V
Reference Voltage
(VOUT = 3.3 V, ILOAD = 0 mA, CREF = 200 nF, TA = −40°C to 85°C)
VREF_NL
1.174
1.220
V
Reference Voltage Temperature Coefficient
TCVREF
0.03
mV/
°C
Reference Voltage Load Current
(VOUT = 3.3 V, VREF = VREF_NL "1.5% CREF = 1.0 mF) (Note 6)
IREF
2.5
mA
Reference Voltage Load Regulation
(VOUT = 3.3 V, ILOAD = 0 to 100 mA, CREF = 1.0 mF)
VREF_LOAD
0.05
1.0
mV
Reference Voltage Line Regulation
(VOUT from 1.5 V to 5.0 V, CREF = 1.0 mF)
VREF_LINE
0.05
1.0
mV/V
FB Input Threshold (ILOAD = 0 mA, TA = 25°C)
VFB
1.192
1.200
1.208
V
FB Input Threshold (ILOAD = 0 mA, TA = −40°C to 85°C)
VFB
1.184
1.210
V
LBI Input Threshold (ILOAD = 0 mA, TA = 25_C)
VLBI
1.182
1.200
1.218
V
LBI Input Threshold (ILOAD = 0 mA, TA= −40_C to 85_C)
VLBI
1.162
1.230
V
Internal N−FET ON−Resistance
RDS(ON)_N
0.3
Internal P−FET ON−Resistance
RDS(ON)_P
0.3
LX Switch Current Limit (N−FET) (Note 8)
ILIM
1.5
A
Operating Current into BAT
(VBAT = 1.8 V, VFB = 1.8 V, VLX = 1.8 V, VOUT = 3.3 V)
IQBAT
1.3
3.0
mA
Operating Current into OUT (VFB = 1.4 V, VOUT = 3.3 V)
IQ
8.5
14
mA
LX Switch MAX. ON−Time (VFB = 1.0 V, VOUT = 3.3 V, TA = 25_C)
tON
0.46
0.72
1.15
ms
LX Switch MIN. OFF−Time (VFB = 1.0 V, VOUT = 3.3 V, TA = 25_C)
tOFF
0.12
0.22
ms
FB Input Current
IFB
1.0
50
nA
True−Cutoff Current into BAT
(LBI/EN = GND, VOUT = 0 V, VIN = 3.3 V, LX = 3.3 V)
IBAT_SD
50
nA
BAT−to−LX Resistance (VFB = 1.4 V, VOUT = 3.3 V) (Note 8)
RBAT_LX
100
LBI/EN Input Current
ILBI
1.5
50
nA
LBO Low Output Voltage (VLBI = 0 V, ISINK = 1.0 mA)
VLBO_L
0.2
V
Soft−Start Time (VIN = 2.5 V, VOUT = 5.0 V, CREF = 200 nF) (Note 7)
TSS
1.5
20
ms
EN Pin Shutdown Threshold (TA = 25°C)
VSHDN
0.35
0.5
0.67
V
Thermal Shutdown Temperature (Note 8)
TSHDN
145
°C
Thermal Shutdown Hysteresis (Note 8)
TSDHYS
30
°C
6. Loading capability increases with VOUT.
7. Design guarantee, value depends on voltage at VOUT.
8. Values are design guaranteed.


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