MP2884A datasheet(5/107 Pages) MPS

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MP2884A – DIGITAL PWM CONTROLLER WITH PMBUS AND PWM-VID

MP2884A Rev. 1.01

www.MonolithicPower.com

12/25/2018

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

PIN FUNCTIONS (continued)

Package

Pin #

Name

Type (1)

Description

TSNS/BOOT

A [I/O]

Thermistor thermal sensing input or boot voltage setting.

TSNS/BOOT can be programmed for either thermistor thermal sensing

or boot voltage setting.

When used as TSNS, the controller compares the voltage of

TSNS/BOOT to an internal programmable threshold. Once triggered,

TALERT# is asserted, and the VR enters a pre-programmed protection

mode.

When used as BOOT, a voltage divider is required from VDD18 to

TSNS/BOOT to set the boot voltage.

SDA

D [I/O]

PMBus data.

SCL

D [I]

PMBus clock.

D [I]

Enable control.

PSI

A [I]

Power saving interface. 1.8V logic. When PSI is 1, all phases have

forced continuous conduction mode (CCM). When PSI is 0, there is an

adjustable low-phase count. When PSI is in Hi-Z, auto-phase-shedding

is enabled.

PGOOD

D [O]

Power good indication. PGOOD is an open-drain output. PGOOD

asserts when the output voltage is in regulation.

PWMVID

A [I]

PWM-VID signal input. PWMVID is a 1.8V logic. Connect the PWM-

VID signal to PWMVID. The VR calculates the target VID based on the

duty.

VTEMP

A [I]

Analog signal from the VR to the controller. VTEMP indicates the

maximum temperature of the power stages. The MP2884A supports

temperature sensing from the Intelli-Phase power stages. Tie all

temperature reporting pins from the Intelli-Phase together to produce

the maximum value on the VTEMP bus.

PAD

AGND

Power

Analog ground.

NOTE:

1) A = analog, D = digital, I = input, O = output, I/O = bidirectional.

ABSOLUTE MAXIMUM RATINGS (2)

VDD33.......................................... -0.3V to +4.0V

VDD18.......................................... -0.3V to +2.0V

CS1~4, PWM1~4, VFB, VDIFF, VOSEN,

VORTN,

PGOOD,

PSI,

SCL,

SDA,

TSNS/BOOT,

TALERT#,

PWMVID,

EN,

VTEMP......................................... -0.3V to +4.0V

CSSUM, IMON, IREF, VINSEN, ADDR ..............

...................................................... -0.3V to +2.0V

Junction temperature ................................ 150°C

Lead temperature...................................... 260°C

Continuous power dissipation (3) ..............3.47W

Recommended Operating Conditions (4)

Supply voltage (VIN) ...................... +3.0V to 3.6V

Operating junction temp. (TJ)....-40°C to +125°C

Thermal Resistance (5)

θJA

θJC

QFN-40 (5mmx5mm)............. 36 ....... 5 ....°C/W

NOTES:

Exceeding these ratings may damage the device.

The maximum allowable power dissipation is a function of

the maximum junction temperature TJ (MAX), the junction-to-

ambient thermal resistance θJA, and the ambient temperature

TA. The maximum allowable continuous power dissipation at

any ambient temperature is calculated by PD (MAX) = (TJ

(MAX)-TA)/θJA. Exceeding the maximum allowable power

dissipation produces an excessive die temperature.

The device is not guaranteed to function outside of its

operating conditions.

Measured on JESD51-7, 6-layer PCB.

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