MCP16501 datasheet(7/42 Pages) MICROCHIP

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DS20006388E-page 7

MCP16501

Hysteretic Control Mode

Enable Threshold,

Auto-PFM (MCP16501E only)

HCM_EN

IOUT1 =0 mA,

PWRHLD = LPM = 1,

VIN = PVIN1 falling,

% of VOUT1_NOM

Switching Frequency

fsw

1.8

2.2

MHz FPWM

Maximum Duty Cycle

DMAX

100

—

Functionality test

Minimum ON Time

TON_MIN1

—35

—

FPWM

High-Side Switch

On-Resistance

RDSonP1

—

140

160

mΩ

PVIN1 = VIN = 3.6V

Low-Side Switch

On-Resistance

RDSonN1

—

120

140

mΩ

PVIN1 = VIN = 3.6V

Start-up POK Bypass

Threshold

VPOKB_TH_B1

360

400

440

PVIN1 – OUT1, OUT1 rising,

PVIN1 = 3.0V, VOUT1_NOM =3.3V

Start-up POK Bypass

Threshold Hysteresis

VPOKB_HYS_B1

—

OUT1 falling, PVIN1 = 3.0V

Soft Start Rate

SSR

—

3.125

—

V/ms —

High-Side Peak Current Limit

(Cycle by Cycle)

ILIM_HS1

1.2

1.8

2.4

—

Current Limit Frequency

Foldback VOUT1 Threshold

VTH_FFB1

—500

—

Hiccup Mode Short-Circuit

Protection Wait Time

tHICCUP

—

3x Soft

Start

Time

—ms

—

Low-Side Negative Peak

Current Limit (FPWM)

ILIM_NEG1

-1.4

-1

-0.8

—

Zero Current Detection

Threshold

IZCD1

050

110

—

Active

Discharge Resistance

RDISCH_OUT1

—25

—

Ω

DISCH enabled when regulator is

disabled

Buck2, Buck3

Input Operating Voltage Range

VPVINx

2.7

—

5.5

—

PVINx Shutdown Current

IPVINx_SHDN

—0.05

µA

Regulator disabled, PVINx = 5V

Output Voltage Accuracy,

FPWM

ACC_OUTPWMx

-1

—

IOUTx = 0 mA, 0.9V ≤ VOUTx ≤ 1.3V

-1.5

—

+1.5

IOUTx =0mA, VOUTx < 0.9V or

VOUTx > 1.3V

Output Voltage Accuracy,

Auto-PFM

ACC_OUTPFMx

-1

—

IOUTx = 0 mA, 0.9V ≤ VOUTx ≤ 1.3V

-1.5

—

+1.5

IOUTx =0mA, VOUTx <0.9V or

VOUTx > 1.3V

Output Voltage Line Regulation

(Note 2)

LINE_REGPWMx

—0.03

—

IOUT1 =0 mA, FPWM,

VIN = PVIN1 = VIN = 3.6V to 5.5V

LINE_REGPFMx

—0.07

—

IOUT1 = 0 mA, Auto-PFM,

VIN = PVIN1 = VIN = 3.6V to 5.5V

Output Voltage Load

Regulation (Note 2)

LOAD_REGPWMx

—0.3

—

IOUTx = 0A to 1A, FPWM

LOAD_REGPFMx

—0.5

—

IOUTx = 0A to 1A, Auto-PFM

Switching Frequency

fsw

1.8

2.2

MHz FPWM

AC/DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise specified: TA =TJ =+25°C; VIN = VIN =PVINx =5V; L1 =L2=L3 =2.2 µH;

COUT1, COUT2,, COUT3=22µF. Boldface type applies for junction temperatures TJ of -40°C to +125°C.

Parameters

Sym.

Min.

Typ.

Max.

Units

Conditions

Note 1:

Maximum limit for TJ = -40°C to +105°C based on characterization data.

Not production tested.

Typical value from bench characterization, maximum value production tested.

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