CM3132 Ver la hoja de datos (PDF) - California Micro Devices Corp

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CM3132

Triple Linear Voltage Regulator for DDR-I Memory and CPU

California Micro Devices Corp 

PRELIMINARY

CM3132

ELECTRICAL OPERATING CHARACTERISTICS (CONT’D) (SEE NOTE1)

VTT Regulator Parameters

VTT

Output Voltage Range

VTT REF Output Voltage Range

VTT LD Load Regulation

eN TT Output Noise Voltage

ITT LIM Current Limit

ITT SC Short Circuit Current

VCORE Regulator Parameters

VCC MIN Input Voltage

VDDQ = 2.5V, ITT = 0.01A,

IDDQ = 0A

VCC = 0V, VDDQ = 2.500V,

ITT = 0.01A

TA = 25°C, VDDQ = 2.5V,

0.01A ≤ ITT ≤ ±0.5A

BW = 10Hz - 100kHz, CTT = 10µF

VTT < 0.7V

VCORE = 1.5V, ICORE = 1.5A,

SENSE_CORE = 0V, Note 3

1.20 1.25 1.30

V

1.225 1.250 1.275

V

-1.0

-

1.0

%

51

0.6

0.8

0.3

µVrms

A

A

2.2

V

VCORE DEF Default Output Voltage Range

VCC = 3.3V, ICORE = 0.01A,

SENSE_CORE = 0V

1.45 1.50 1.55

V

VCORE ADJ Adjustable Output Voltage

VCC = 3.3V, SENSE_CORE from

1.2

Range

resistors R3 & R4, Note 4

1.8

V

VCORE LD Load Regulation

VCORE LINE Line Regulation

eN CORE

ICORE LIM

ICORE SC

Output Noise Voltage

Current Limit

Short Circuit Current

TA = 25°C, VCC = 3.3V,

0.01A ≤ ICORE ≤ ±1.5

-

-

TA = 25°C, 2.8V ≤ VCC ≤ 3.6V,

ICORE = 0.01A

-1.0

-

BW = 10Hz - 100kHz, CCORE = 47µF

59

1.7

2.0

VCORE < 0.3V

0.5

2.5

%

1.0

%

µVrms

A

A

Note 1: All parameters specified at TA = 0°C to +85°C unless otherwise noted.

Note 2: Note that the IDDQ current specified is the load current output from the VDDQ pin. VDDQ also supplies current internally to the

VTT regulator when it is sourcing current. The maximum source current can be up to 0.5A.The maximum total current from

the VDDQ regulator is the external VDDQ current IDDQ added to the maximum VTT sourcing current ITT. All load currents are

specified as such, but the VDDQ current limit is specified at a current just above the total maximum current.

Note 3: VCORE regulator only. Refer to VDDQ regulator parameters for VDDQ regulator.

Note 4: VCORE = 1.15V X (1 + RR-----34-- )

VCC(1)

EN_DDR

VDDQ OUT

VTT OUT

2.8V to 3.6V

X

Low

High

VDDQ

0V

VDDQ / 2

0V

Table 1: Truth Table for CM3132

© 2004 California Micro Devices Corp. All rights reserved.

10/13/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ● Tel: 408.263.3214 ● Fax: 408.263.7846 ● www.calmicro.com 5

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