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LM26420, LM26420-Q0, LM26420-Q1
SNVS579J –FEBRUARY 2009–REVISED SEPTEMBER 2015
LM26420/LM26420-Q0/Q1 Dual 2-A Automotive-Qualified, High-Efficiency Synchronous
DC-DC Converter
1 Features
3 Description
The LM26420 regulator is
a monolithic, high-
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Input Voltage Range of 3 V to 5.5 V
Output Voltage Range of 0.8 V to 4.5 V
2-A Output Current per Regulator
efficiency dual PWM step-down DC-DC converter.
This device has the ability to drive two 2-A loads with
an internal 75-mΩ PMOS top switch and an internal
50-mΩ NMOS bottom switch using state-of-the-art
BICMOS technology results in the best power density
available. The world-class control circuitry allow on
times as low as 30 ns, thus supporting exceptionally
high-frequency conversion over the entire 3-V to 5.5-
V input operating range down to the minimum output
voltage of 0.8 V.
High Switching Frequency: 2.2 MHz (LM26420X)
0.55 MHz (LM26420Y)
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0.8 V, 1.5% Internal Voltage Reference
Internal Soft-start
Independent Power Good and Precision Enable
for Each Output
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Current Mode, PWM Operation
Thermal Shutdown
Although the operating frequency is high, efficiencies
up to 93% are easy to achieve. External shutdown is
included, featuring an ultra-low standby current. The
LM26420 utilizes current-mode control and internal
compensation to provide high performance regulation
over a wide range of operating conditions.
Overvoltage Protection
Start-up into Pre-biased Output Loads
Regulators are 180° Out of Phase
LM26420-Q0: AEC-Q100 Grade 0 (Q0) Qualified
(TJ = –40°C to 150°C)
LM26420-Q1: AEC-Q100 Grade 1 (Q1) Qualified
(TJ = –40°C to 125°C)
Device Information(1)
PART NUMBER
PACKAGE
HTSSOP (20)
WQFN (16)
BODY SIZE (NOM)
6.50 mm x 4.40 mm
4.00 mm x 4.00 mm
LM26420
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Compliant with CISPR25 Class 5 Conducted
Emissions
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
2 Applications
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Local 5 V to Vcore of FPGAs
Core Power in HDDs and Set-Top Boxes
USB Powered Devices
Powering Core and I/O Voltages for CPUs and
ASICs
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Automotive Camera, Infotainment, and Clusters
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LM26420 Dual Buck DC-DC Converter
LM26420 Efficiency (Up to 93%)
VIN
3V to 5.5V
VIN
PG
EN
PG
EN
2
2
1
Buck 1
VOUT1
Buck 2
VOUT2
1
2.5V/2A
1.2V/2A
SW
FB
SW
FB
2
2
1
1
GND
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.