The Future of Analog IC Technology®MPS Confidential –– Do Not Distribute

Xilinx Spartan-7 Reference Design

Sep 13, 2018

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300mA LDO2

300mA LDO4

DCDC1

5.5V/4.5A

I2C VID, 0.6V-2.187V

2.7V-5.5V

Vin1

UVLO1.5MHz OSC

Phase shift

GND1

Vout1SW1

FB1

SCL

Driver &

Control

I2C Register & OTP

Power Logic Control

DCDC2

5.5V/2.5A

I2C VID, 0.8V-3.975V

Vout2SW2

FB2

DCDC3

5.5V/4A

I2C VID, 0.6V-2.187V

Vout3SW3

FB3

DCDC4

5.5V/2A

I2C VID, 0.8V-3.975V

Vout4SW4

FB4

OUT4

300mA LDO5

Driver &

Control OUT5

SDA

Control Logic

VIN1

VIN3

GND3

nPBIN

RSTO

AGND

10mA LDORTCDriver &

Control

Driver &

Control

300mA LDO3Driver &

Control

OUTRTC OUT2 OUT3

VIN2

AVIN

2.7V-5.5V

AVIN

1uFAGND

VIN5

GND2

VIN2

GND4

VIN4

1.5*/1.35V +/-5% @ 4.5A max

0.95/1*V +/-5% @ 4A max

1.8/2.5/3.3*V +/-5% @ 2.5A max

1.8*V +/-5% @ 2A max

Vsupply = 5V

Power on sequence 1 2 3

VCC_DDR

VCC_IO

VCCINT

VCCAUX

Block Diagram–

Spartan-7

MP5416

*Default Settings for MP5416-0028

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Power-Up Sequence

Vin = 5V

NOTE: Sequencing can be customized to any design requirements via OTP

VCCINT

VCC_IO

VCCDDR

VCCAUX

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Power-Down Sequence

Vin = 5V

NOTE: Sequencing can be customized to any design requirements via OTP

VCCINT

VCC_IO

VCCDDR

VCCAUX

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VCCINT (1V) Efficiency

0

10

20

30

40

50

60

70

80

90

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5

EF

FIC

IEN

CY

(%

)

IOUT (A)

VCC_INT Efficiency @ Vin = 5V, Vout = 1V

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VCCAUX (1.8V) Efficiency

0

10

20

30

40

50

60

70

80

90

0 0.5 1 1.5 2 2.5

EF

FIC

IEN

CY

(%

)

IOUT (A)

VCC_AUX Efficiency @ Vin = 5V, Vout = 1.8V

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VCCDDR (1.5V) Efficiency

0

10

20

30

40

50

60

70

80

90

100

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5

EF

FIC

IEN

CY

(%

)

IOUT (A)

VCC_DDR Efficiency @ Vin = 5V, Vout = 1.5V

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VCC_IO (3.3V) Efficiency

0

10

20

30

40

50

60

70

80

90

100

0 0.5 1 1.5 2 2.5 3

EF

FIC

IEN

CY

(%

)

IOUT (A)

VCC_IO Efficiency @ Vin = 5V, Vout = 3.3V

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VCCINT (1V) Output Ripple

Vin = 5V, Vout = 1V, Iout = 2.5A

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VCCAUX (1.8V) Output Ripple

Vin = 5V, Vout = 1.8V, Iout = 0.35A

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VCCDDR (1.5V) Output Ripple

Vin = 5V, Vout = 1.5V, Iout = 2A

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VCC_IO (3.3V) Output Ripple

Vin = 5V, Vout = 3.3V, Iout = 2.5A

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VCCINT (1V) Transient Response

Vin = 5V, Vout = 1V, Iout = 1A to 3A @ 10A/µs

Iout Delta

Vout

Vin

100mV = 2A

Output Current

Change

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VCCAUX (1.8V) Transient Response

Vin = 5V, Vout = 1.8V, Iout = 0.5A to 1.5A @ 10A/µs

Vin

Iout Delta

Vout

50mV = 1A Output

Current Change

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VCCDDR (1.5V) Transient Response

Vin = 5V, Vout = 1.5V, Iout = 1.125A to 3.375A @ 10A/µs

Iout Delta

Vout

Vin

112.5mV = 2.25A

Output Current

Change

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VCC_IO (3.3V) Transient Response

Vin = 5V, Vout = 3.3V, Iout = 0.625A to 1.875A @ 10A/µs

Iout Delta

Vout

Vin

62.5mV = 1.25A

Output Current

Change