NCP1421 Datasheet, PDF(4/14 Page) ON Semiconductor – 600 mA Sync-Rect PFM Step-Up DC-DC Converter Step-Up DC-DC Converter with True-Cutoff and Ring-Killer

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

NCP1421 Datasheet, PDF (4/14 Pages) ON Semiconductor – 600 mA Sync-Rect PFM Step-Up DC-DC Converter Step-Up DC-DC Converter with True-Cutoff and Ring-Killer

◁

NCP1421

ELECTRICAL CHARACTERISTICS (VOUT = 3.3 V, TA = 25Â°C for typical value, â40Â°C v TA v 85Â°C for min/max values unless

otherwise noted.)

Characteristic

Symbol

Min

Typ

Max

Unit

Operating Voltage

Output Voltage Range

Reference Voltage

(VOUT = 3.3 V, ILOAD = 0 mA, CREF = 200 nF, TA = 25Â°C)

Reference Voltage

(VOUT = 3.3 V, ILOAD = 0 mA, CREF = 200 nF, TA = â40Â°C to 85Â°C)

VIN

1.0

5.0

VOUT

1.5

5.0

VREF_NL

1.183

1.200

1.217

VREF_NL

1.174

1.220

Reference Voltage Temperature Coefficient

Reference Voltage Load Current

(VOUT = 3.3 V, VREF = VREF_NL "1.5% CREF = 1.0 mF) (Note 5)

TCVREF

IREF

0.03

mV/Â°C

2.5

Reference Voltage Load Regulation

(VOUT = 3.3 V, ILOAD = 0 to 100 mA, CREF = 1.0 mF)

VREF_LOAD

0.05

1.0

Reference Voltage Line Regulation

(VOUT from 1.5 V to 5.0 V, CREF = 1.0 mF)

FB Input Threshold (ILOAD = 0 mA, TA = 25Â°C)

FB Input Threshold (ILOAD = 0 mA, TA = â40Â°C to 85Â°C)

LBI Input Threshold (ILOAD = 0 mA, TA= â40_C to 85_C)

LBI Input Threshold (TA = 25_C)

Internal NFET ONâResistance

Internal PFET ONâResistance

LX Switch Current Limit (NâFET) (Note 7)

Operating Current into BAT

(VBAT = 1.8 V, VFB = 1.8 V, VLX = 1.8 V, VOUT = 3.3 V)

Operating Current into OUT (VFB = 1.4 V, VOUT = 3.3 V)

LX Switch MAX. ONâTime (VFB = 1.0 V, VOUT = 3.3 V, TA = 25_C)

LX Switch MIN. OFFâTime (VFB = 1.0 V, VOUT = 3.3 V, TA = 25_C)

FB Input Current

TrueâCutoff Current into BAT

(LBI/EN = GND, VOUT = 0, VIN = 3.3 V, LX = 3.3 V)

VREF_LINE

VFB

VLBI

RDS(ON)_N

RDS(ON)_P

ILIM

IQBAT

tON

tOFF

IFB

IBAT

1.192

1.184

1.162

1.182

0.46

0.05

1.200

0.3

1.5

1.3

8.5

0.72

0.12

1.0

mV/V

1.208

1.210

1.230

1.218

1.15

0.22

BATâtoâLX Resistance (VFB = 1.4 V, VOUT = 3.3 V) (Note 7)

LBI/EN Input Current

LBO Low Output Voltage (VLBI = 0, ISINK = 1.0 mA)

SoftâStart Time (VIN = 2.5 V, VOUT = 5.0 V, CREF = 200 nF) (Note 6)

EN Pin Shutdown Threshold (TA = 25Â°C)

Thermal Shutdown Temperature (Note 7)

Thermal Shutdown Hysteresis (Note 7)

5. Loading capability increases with VOUT.

6. Design guarantee, value depends on voltage at VOUT.

7. Values are design guaranteed.

RBAT_LX

100

ILBI

1.5

VLBO_L

0.2

TSS

1.5

VSHDN

0.35

0.5

0.67

TSHDN

145

Â°C

TSDHYS

Â°C

http://onsemi.com

▷