MAX8760 データシートの表示（PDF） - Maxim Integrated

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MAX8760

Dual-Phase, Quick-PWM Controller for AMD Mobile Turion 64 CPU Core Power Supplies

Maxim Integrated 

Dual-Phase, Quick-PWM Controller for AMD

Mobile Turion 64 CPU Core Power Supplies

SHDN

VID (D0–D5)

SOFT-START

1 LSB PER 4 RTIME CYCLES

VCORE

DO NOT CARE

SOFT-SHUTDOWN

1 LSB PER 4 RTIME CYCLES

VROK

tVROK(START)

5ms (TYP)

Figure 2. Power-Up and Shutdown Sequence Timing Diagram

Table 2. Component Suppliers

MANUFACTURER

BI Technologies

Central Semiconductor

Coilcraft

Coiltronics

Fairchild Semiconductor

International Rectifier

Kemet

Panasonic

Sanyo

Siliconix (Vishay)

Sumida

Taiyo Yuden

PHONE

714-447-2345 (USA)

631-435-1110 (USA)

800-322-2645 (USA)

561-752-5000 (USA)

888-522-5372 (USA)

310-322-3331 (USA)

408-986-0424 (USA)

847-468-5624 (USA)

65-6281-3226 (Singapore)

203-268-6261 (USA)

408-982-9660 (USA)

03-3667-3408 (Japan)

408-573-4150 (USA)

TDK

TOKO

847-803-6100 (USA)

81-3-5201-7241 (Japan)

858-675-8013 (USA)

WEBSITE

www.bitechnologies.com

www.centralsemi.com

www.coilcraft.com

www.coiltronics.com

www.fairchildsemi.com

www.irf.com

www.kemet.com

www.panasonic.com

www.secc.co.jp

www.vishay.com

www.sumida.com

www.t-yuden.com

www.component.tdk.com

www.tokoam.com

Internal Multiplexers

The MAX8760 has a unique internal DAC input

multiplexer (MUXes) that selects one of three different

DAC code settings for different processor states

(Figure 3). On startup, the MAX8760 selects the DAC

code from the D0–D5 (SUS = GND) or S0, S1 (SUS = REF

or high) input decoders.

DAC Inputs (D0–D5)

During normal forced-PWM operation (SUS = GND), the

digital-to-analog converter (DAC) programs the output

voltage using the D0–D5 inputs. Do not leave D0–D5

unconnected. D0–D5 can be changed while the

MAX8760 is active, initiating a transition to a new output

voltage level. Change D0–D5 together, avoiding greater

than 1µs skew between bits. Otherwise, incorrect DAC

readings can cause a partial transition to the wrong volt-

age level followed by the intended transition to the correct

voltage level, lengthening the overall transition time. The

available DAC codes and resulting output voltages are

compatible with AMD K9 voltage specifications (Table 4).

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