Characteristics

Conditions

Min

Typ

Max

Unit

Over Temperature Protection,

OTP at P1

See Note 8

OTP threshold

120

°C

OTP threshold range

PMBus configurable

-40…+120

°C

OTP hysteresis

15

°C

OTP hysteresis range

PMBus configurable

0-160

°C

Fault response

See Note 3

Automatic restart, 240 ms

V

IL

Logic input low threshold

SYNC, SA0, SA1, SCL, SDA, GCB, CTRL,

VSET

0.8

V

V

IH

Logic input high threshold

2

V

I

IL

Logic input low sink current

CTRL

0.6

mA

V

OL

Logic output low signal level

SYNC, SCL, SDA, SALERT, GCB, PG

0.4

V

V

OH

Logic output high signal level

2.25

V

I

OL

Logic output low sink current

4mA

I

OH

Logic output high source current

2mA

t

set

Setup time, SMBus

See Note 1

300

ns

t

hold

Hold time, SMBus

See Note 1

250

ns

t

free

Bus free time, SMBus

See Note 1

2

ms

C

p

Internal capacitance on logic pins

10

pF

Initialization time

See Note 10

35

ms

Output Voltage

Delay Time

See Note 6

Delay duration

See Note 16

10

ms

Delay duration range

PMBus configurable

2-500000

Delay accuracy

turn-on

Default configuration:

CTRL controlled

Precise timing enabled

±0.25

ms

PMBus controlled

Precise timing disabled

Current sharing operation

-0.25/+4

ms

Delay accuracy

turn-off

-0.25/+4

ms

Output Voltage

Ramp Time

See Note 13

Ramp duration

10

ms

Ramp duration range

PMBus configurable

0-200

Ramp time accuracy

100

μs

Current sharing operation

20

%

VTRK Input Bias Current

V

110

200

μA

VTRK Tracking Ramp Accuracy (V

100% tracking, see Note 7

-100

100

mV

Current sharing operation

2 phases, 100% tracking

V

±100

mV

VTRK Regulation Accuracy (V

100% Tracking

-1

1

%

Current sharing operation

100% Tracking

-2

2

%

Current difference between products in a current sharing group

Steady state operation

Max 2 x READ_IOUT monitoring accuracy

Ramp-up

4

A

Number of products in a current sharing group

7

Monitoring accuracy

READ_VIN vs V

I

3%

READ_VOUT vs V

O

1%

READ_IOUT vs I

O

I

V

±2.5

A

READ_IOUT vs I

O

I

V

±4

A

Note 1: See section I2C/SMBus Setup and Hold Times – Definitions.

Note 2: Monitorable over PMBus Interface.

Note 3: Automatic restart ~70 or 240 ms after fault if the fault is no longer present. Continuous restart attempts if the

fault reappear after restart. See Operating Information and AN302 for other fault response options.

Note 4: T

Note 5: Within +/-3% of V

O

Note 6: See section Soft-start Power Up.

Note 7: Tracking functionality is designed to follow a VTRK signal with slew rate < 2.4 V/ms. For faster VTRK signals

accuracy will depend on the regulator bandwidth.

Note 8: See section Over Temperature Protection (OTP).

Note 9: See section External Capacitors.

Note 10: See section Initialization Procedure.

Note 11: See graph Output Ripple vs External Capacitance and Operating information section Output Ripple and Noise.

Note 12: See graph Load Transient vs. External Capacitance and Operating information section External Capacitors.

Note 13: Time for reaching 100% of nominal Vout.

Note 14: For Vout < 1.0 V accuracy is +/-10 mV. For further deviations see section Output Voltage Adjust using PMBus.

Note 15: Accuracy here means deviation from ideal output voltage level given by configured droop and actual load.

Includes line, load and temperature variations.

Note 16: For current sharing the Output Voltage Delay Time must be reconfigured to minimum 15 ms.

Note 17: For steady state operation above 1.05 x 3.3 V, please contact your local Murata sales representative.

Note 18: A minimum load current is not required if Low Power mode is used (monitoring disabled).

OKDx-T/40-W12-xxx-C

40A Digital PoL DC-DC Converter Series

MDC_OKDx-T/40-W12-xxx-C.A04 Page 5 of 38

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