SMM105NNCR01 データシートの表示（PDF） - Summit Microelectronics

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SMM105NNCR01

Single-Channel Supply Voltage Marginer and Active DC Output Controller

Summit Microelectronics 

APPLICATIONS INFORMATION (CONTINUED)

SMM105

Preliminary Information

VDD (+2.7V to +5.5V)

+12VIN (+10V to +15V)

The SMM105 and the DC-DC Converter

Can Operate with either 12V or VDD

If 12V is used, VDD can be left floating

If VDD is used, 12V can be left floating

Supply J2

D1

Vdd

DIODE

C3

0.01uF

C2

0.1uF

R8

R9

10K

10K

START

READY

FAULT#

J1

1

3

5

Gnd

Gnd3

SCL

SDA

2

4

6

7

9

Rsrv5 MR

+10V Rsrv8

+5V Rsrv10

8

10

C8

0.1uF

C4

0.1uF

C7

0.01uF

If the SMM105 internal VREF

is used, the VREF_CNTL pin

becomes an output

J1

Ext VRef

C6

0.1uF

U4 LM4121

Vdd

5 VOut VIn 4

1 Ref

EN 3

U1

C1 1uF

3

5

11

START

READY

TRIM_CAP

TRIM

18

20

14

FAULT#

VM 19

COMP1

COMP2

12

1

28

SCL

SMM105

C10

C9

10 0.01uF

6

4

2

SDA

A0

A1

A2

FILT_CAP

WP# 8

C5

0.02uF

RT2

~10K

tt

R1

R2

10K

10K

U2

DC-DC Converter

7

8

+Vin

11

9

+Vin

Enable

+Vin

+Vout

1

2

+Vout

+Vout

Sense

4

3

10

Trim

DC-DC ENABLE

SMX3200 I2C Programming

Connector 10 pin Header

VOUT

Figure 6 – SMM105 Applications schematic. The accuracy of the external (U4) or internal reference sets the

accuracy of the ADOC function. Total accuracy with a ±0.1% external reference is ±0.2% and ±0.5% with the

internal reference. The 12V supply can go as low as 8V if the internal regulator is set to 3.6V.

Summit Microelectronics, Inc

2068 1.8 09/20/05

10

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