PSAS/ SwitchingVoltageRegulators

Switching (some Linear) Voltage Regulators

Here are two good application notes explaining the basics of linear and

Tentative Specs:

Potential Buck Regulators

( Syc = synchronizable, SD = shutdown mode )

Part #

Vin (V)

Vo (V)

Adj.

Syc

SD

IoMax

Iq(uA)

F(MHz)

Package

Notes

Datasheet

LT1767

8 - 25

1.22 - 20

Y

Y

Y

1.2A

6

2

msop8

Used in previous node

link

LT3437

3.3 - 60

3.3 - 55

Y

Y

Y

500mA

1 (for Burst Mode 100)

0.2

dfn10

Burst-Mode operation

link

LT1962

1.8 - 20

1.22 - 20

Y

n/a

?

300mA

30

n/a

msop8

Micropower LDO Regulator (Linear)

link

LT3493

3.6 - 36

Down to 0.78

Y

N

?

1.5A

2

0.75

Low-profile DFN

link

LT1940

3.6 - 25

?

Y

N

Y

1.4A

3800 Quiescent/ 30 Shutdown

1.1

16-lead Plastic TSSOP

Dual Output Step Down Reg.

link

LT1616

3.6 - 25

?

Y

N

Y

0.6A

< 1

1.4

6-lead SOT-23

link

MIC2207

2.7 - 5.5

Down to 1

Y

N

Y

3A

<= 900

2

Micropower 12-lead MLF-12

>94% eff. PWM Buck

link

MIC2204

2.7 - 5.5

Down to 1

Y

Y

Y

0.6A

6.5 (disabled)

2

10-lead MSOP (MM) or MLF-10 (ML)

>95% eff. PWM Buck, Sync daisy-chain option

link

MIC2202

2.7 - 5.5

Down to 0.5

Y

Y

Y

0.6A

< 1 (disabled)

2

10-lead MSOP (MM) or MLF-10 (ML) The MLF-10 has thermal ground pad

>95% eff. PWM Buck, Sync daisy-chain option

link

Switcher Pick

Tim, Andrew and I chose to use the same switching voltage regulator LT1767 from Linear Tech (3-8-06). See the SPS Design Page.