NCP1421 Boost Converter Overview



NCP1421 is a 5.00 V, 1.50 A switch current limit sync Boost Converter from . The input voltage from 1.00 V to 5.50 V  can be boosted into an output voltage ranging from 1.50 V to 5.00 V.

Features of the Boost Converter are fixed 1200 kHz switching frequency, a typical inductor size of 6.5 µH and it offers a peak efficiency of  up to 94 %. The minimum external component count is 9 and NCP1421 is available in 1 package option(s): Micro8™-8 .

For NCP1421 replacement search, select a main parameter tolerance value and adjust the checkboxes for feature match. The product counter within the button shows the number of available equivalents and a click on the replacement button shows all possible replacements within a parametric overview.

Search Filter
V-IN min. 1.00 V
V-IN max. 5.50 V
Current-Limit typ.? 1.50 A
V-OUT min. 1.50 V
V-OUT max. 5.00 V
VOUT adjustable
VOUT programmable no
sync/non-sync sync
Frequency typ. 1200 kHz
Frequency adjustable fixed
Frequency selectable
Frequency adj. min.
Frequency adj. max.
extern clock sync. no
Softstart yes
Softstart adjustable no
Tracking no
PG/Power OK no
Frequency sync. min.
Frequency sync. max.
Down Mode no
Quiescent current max. 14 µA
Operating min. -40 °C
Operating max. 85 °C
Junction min. -40 °C
Junction max. 150 °C
thermal shutdown typ. 145 °C
Inductor size typ. 6.5 µH
Inductor suggested by Würth Elektronik
Automotive AEC-Q100 no
Light-Load-Mode yes
Topology Boost
Peak Efficiency 94 %
Component count min. 9
current limit adjustable no
Nr.of package options 1
MSOP Micro8™-8

NCP1421 Datasheet

Link to the most up-to-date NCP1421 datasheet and the product page for EVM, tools and support information.


NCP1421 Price breaks and distributor sample stock

NCP1421 prices and available online distributors.

Available Distributors with stock: 0

no online Distributor with NCP1421 stock available

Available Distributors with stock: 0

no online Distributor with NCP1421 stock available

Alternatives and equivalents

The following DC/DC Boost Converter are similar to NCP1421. Optional, compare NCP1421 side-by-side with other Boost Converter via the Comparison function.

Variation Compare Product Manufacturer Package
0% NCP1422 NCP1422 product overviewNCP1422 product overview ON Semiconductor DFN-10
0% TPS61020 TPS61020 product overviewTPS61020 product overview Texas Instruments QFN-10
0% TPS61029 TPS61029 product overviewTPS61029 product overview Texas Instruments QFN-10
0% TPS61029-Q1 TPS61029-Q1 product overviewTPS61029-Q1 product overview Texas Instruments QFN-10
10% MAX1703 MAX1703 product overviewMAX1703 product overview Maxim Integrated SOIC-16
10% MAX1763 MAX1763 product overviewMAX1763 product overview Maxim Integrated TSSOP-EP-16
25% MAX1701 MAX1701 product overviewMAX1701 product overview Maxim Integrated QSOP-16
25% MAX1705 MAX1705 product overviewMAX1705 product overview Maxim Integrated QSOP-16
25% RT9276 RT9276 product overviewRT9276 product overview Richtek WDFN-10
50% NCP1423 NCP1423 product overviewNCP1423 product overview ON Semiconductor Micro-10
50% TPS61028 TPS61028 product overviewTPS61028 product overview Texas Instruments QFN-10

Inductor suggestions

Below you can find matching inductors from Wuerth Elektronik calculated on the maximum parameters of NCP1421.

V-IN min. 1 V, Current-Limit typ. 1.5 A, V-OUT max. 5 V, Frequency typ. 1200 kHz
Order Code Spec L (µH) IR (A) ISAT (A) RDC (mΩ) L x W x H (mm)
74407000018 0.2 9.0 9.0 3.51 8 x 8 x 2
744373240022 0.2 9.5 17.0 6.60 4.45 x 4.06 x 2
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