RoHS Compliance Information	Size in Kbytes	Date
LM26420 Dual 2.0A, High Frequency Synchronous Step-Down DC-DC Regulator	601 Kbytes	1-Jun-09	Download

Part Number

Package

Factory Lead Time

Models

Samples & Electronic Orders

Budgetary Pricing

Std Pack Size

Package Marking Format

Type

Pins

Spec.

MSL Rating

Peak Reflow

RoHS Report

CAD Symbols

Weeks

Qty

Qty

$US each

LM26420XMH

TSSOP EXP PAD

20

NOPB

1

260

RoHS

N/A

Full production

N/A

1K+

$2.38

rail of 73

NSUZXYTT LM26420 XMH

16 weeks

N/A

LM26420YMH

TSSOP EXP PAD

20

NOPB

1

260

RoHS

N/A

Full production

N/A

1K+

$2.28

rail of 73

NSUZXYTT LM26420 YMH

6 weeks

N/A

LM26420XMHX

TSSOP EXP PAD

20

NOPB

1

260

RoHS

N/A

Full production

N/A

1K+

$2.38

reel of 2500

NSUZXYTT LM26420 XMH

16 weeks

N/A

LM26420YMHX

TSSOP EXP PAD

20

NOPB

1

260

RoHS

N/A

Full production

N/A

1K+

$2.28

reel of 2500

NSUZXYTT LM26420 YMH

8 weeks

N/A

LM26420XMHEVAL

LM26420 2.2 MHz, eTSSOP Synchronous Buck Evaluation Board

Full production

N/A

1+

$85.00

1

-

8 weeks

N/A

LM26420XSQEVAL

LM26420 2.2 MHz, LLP Synchronous Buck Evaluation Board

Full production

N/A

1+

$85.00

1

-

8 weeks

N/A

LM26420YMHEVAL

LM26420 550 kHz, eTSSOP Synchronous Buck Evaluation Board

Full production

N/A

1+

$85.00

1

-

8 weeks

N/A

LM26420YSQEVAL

LM26420 550 kHz, LLP Synchronous Buck Evaluation Board

Full production

N/A

1+

$85.00

1

-

8 weeks

N/A

LM26420XSQ

LLP

16

NOPB

3

260

RoHS

N/A

Full production

N/A

1K+

$2.38

reel of 1000

NS UZXYTT L26420X

6 weeks

N/A

LM26420YSQ

LLP

16

NOPB

3

260

RoHS

N/A

Full production

N/A

1K+

$2.28

reel of 1000

NS UZXYTT L26420Y

6 weeks

N/A

LM26420XSQX

LLP

16

NOPB

3

260

RoHS

N/A

Full production

N/A

1K+

$2.38

reel of 4500

NS UZXYTT L26420X

16 weeks

N/A

LM26420YSQX

LLP

16

NOPB

3

260

RoHS

N/A

Full production

N/A

1K+

$2.28

reel of 4500

NS UZXYTT L26420Y

12 weeks

N/A

General Description

The LM26420 regulator is a monolithic, high frequency, dual PWM step-down DC/DC converter in a 16 Pin LLP and a 20 Pin eTSSOP package. It provides all the active functions to provide local DC/DC conversion with fast transient response and accurate regulation in the smallest possible PCB area. With a minimum of external components, the LM26420 is easy to use. The ability to drive two 2.0A loads with an internal 75 mΩ PMOS top switch and an internal 50 mΩ NMOS bottom switch using state-of-the-art 0.5 µm BiCMOS technology results in the best power density available. The world-class control circuitry allows on-times as low as 30ns, thus supporting exceptionally high frequency conversion over the entire 3V to 5.5V input operating range down to the minimum output voltage of 0.8V. Switching frequency is internally set to 550 kHz or 2.2 MHz, allowing the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequency is high, efficiencies up to 93% are easy to achieve. External shutdown is included, featuring an ultra-low stand-by current. The LM26420 utilizes current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, power good indicators, precision enables, and output over-voltage protection.

Application Notes

Title	Size in Kbytes	Date
AN-1870: Application Note 1870 LM26420 Evaluation Board	429 Kbytes	14-Apr-09	Download
AN-1973: Application Note 1973 Benefits and Challenges of High-Frequency Regulators	348 Kbytes	25-Jun-09	Download