NCP1406_12 Datasheet, PDF(5/19 Page) ON Semiconductor – 25 V/25 mA PFM Step-Up DC-DC Converter

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NCP1406_12 Datasheet, PDF (5/19 Pages) ON Semiconductor – 25 V/25 mA PFM Step-Up DC-DC Converter

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NCP1406, NCV1406

ELECTRICAL CHARACTERISTICS (VOUT = 25 V, TA = â40_C to +85_C (NCP1406), TA = â40_C to +105_C (NCV1406) for min/max

values, typical values are at TA = 25_C, unless otherwise noted.)

Characteristic

Symbol

Min

Typ Max Unit

ON/OFF TIMING CONTROL

Minimum Off Time (VDD = 3.0 V, VFB = 0 V)

Maximum On Time (Current Not Asserted)

Maximum Duty Cycle

Minimum Startup Voltage (IOUT = 0 mA)

Minimum Startup Voltage Temperature Coefficient (TA = â40 to +105Â°C)

Minimum Hold Voltage (IOUT = 0 mA)

SoftâStart Time

LX (PIN 5)

Internal Switch Voltage (Note 4) (Note 5)

LX Pin OnâState Resistance (VLX = 0.4 V, VDD = 5.0 V)

Current Limit (When ILX reaches ILIM, the LX switch is turned off by the

LX switch protection circuit) (Note 5)

toff

ton

DMAX

Vstart

DVstart

Vhold

tSS

VLX

Rsw(on)

ILIM

0.08 0.13 0.20

0.58 0.90 1.40

1.8

2.0

1.6

â mV/Â°C

1.7

1.9

3.0

8.0

0.7

0.80

OffâState Leakage Current (VLX = 26 V)

CE (PIN 1)

CE Input Voltage (VDD = 3.0 V, VFB = 0 V)

High State, Device Enabled

Low State, Device Disabled

CE Input Current

High State, Device Enabled (VDD = VCE = 5.5 V)

Low State, Device Disabled (VDD = 5.5 V, VCE = VFB = 0 V)

ILKG

0.1

1.0

VCE(high)

0.9

VCE(low)

0.3

ICE(high)

500

ICE(low)

â500 â150

TOTAL DEVICE

Supply Voltage

Undervoltage Lockout (VDD Falling)

Feedback Voltage

TA = 25Â°C

TA = â40 to +105Â°C

Feedback Pin Bias Current (VFB = 1.19 V)

Operating Current 1 (VFB = 0 V, VDD = VCE = 3.0 V, Maximum Duty Cycle)

Operating Current 2 (VDD = VCE = VFB = 3.0 V, Not Switching)

OffâState Current (VDD = 5.0 V, VCE = 0 V)

Thermal Shutdown (Note 5)

Thermal Shutdown Hysteresis (Note 5)

4. Recommended maximum VOUT up to 25 V.

5. Guaranteed by design, not tested.

VDD

VUVLO

VFB

IFB

IDD1

IDD2

IOFF

TSD

TSDHYS

1.4

5.5

1.0

1.3

1.178 1.190 1.202 V

1.170 1.190 1.210

0.7

1.5

0.3

1.3

140

Â°C

http://onsemi.com

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