KTB8331

December 2021

– Revision 04b

Page 7 of 25

Kinetic Confidential

Electrical Characteristics (continued)8

Unless otherwise noted, the Min and Max specs are applied over the full operation temperature range of

-40°C to +85°C and VIN = 2.7V to 5.5V. Typ values are specified at +25°C with VIN = 3.6V.

Buck Regulator Specifications

Symbol

Description

Conditions

Min

Typ

Max

Units

VOUT

Output Voltage Setting Range

Low Range (G=1), RANGE[0]=0

0.600

1.39375

V

High Range (G=2.4), RANGE[0]=1

1.440

3.345

V

VOUT_STEP

Output Voltage Setting Step Size

Low Range (G=1), RANGE[0]=0

6.25

mV

High Range (G=2.4), RANGE[0]=1

15

mV

VOUT_ACC

Output Voltage DC Accuracy

TA = 25

C, VOUT = 1.15625V,

FPWM

-1

±0.2

1

%

FPWM over line/load/temp/setting

-2.5

±1

2.5

%

Auto-Skip over line/setting

±1

%

VOUT_LOAD

Output Voltage Load Regulation9

ILOAD = 1A to 3A, FPWM

-0.01

%/A

VOUT_LINE

Output Voltage Line Regulation9

VIN = 2.7V to 5.5V, ILOAD = 1.5A

±0.01

%/V

VOUT_TRAN

Output Voltage Transient

Response9

ILOAD = 10mA

1.5A,

tr = tf = 200ns, VOUT = 1.15625V

±50

mV

IOUT_MAX

Maximum Output Current

3

A

ILX_PEAK

LX Peak Current Limit

4

4.6

5.5

A

ILX_VALLEY

LX Valley Current Limit

3

4.3

5.5

A

ILX_LEAK

LX Leakage Current

VLX = 0V or 5.5V, TA = 25

C

0.1

1

µA

RDSON_MS

Main Switch On-Resistance

MOSFET + metal + bumps

50

mΩ

RDSON_SR

Synch. Rectifier On-Resistance

MOSFET + metal + bumps

30

mΩ

RLX_DIS

LX Active Discharge Resistance

EN = 0 or ENn[0] = 0, DIS[0] = 1

133

Ω

tSS_DELAY

Soft-Start Ramp Delay9

Hardware enable, EN=0

→1

350

µs

Software enable, ENn[0] = 0

→1

315

µs

dV/dtSS

Soft-Start Ramp Rates

10 programmable rates

1.5625

30

mV/µs

tDVS_DELAY

DVS Ramp Delay9

Hardware DVS, VSEL = 0

1

3

µs

Software DVS, by I2C command

<10

µs

dV/dtDVS

DVS Ramp Rates

8 programmable rates

3.125

25

mV/µs

VOUT_POK

VOUT Power OK Threshold

Percentage of VOUT setting, falling

88

%

Percentage of VOUT setting, rising

92

%