MIC2133 datasheet(8/50 Pages) MICROCHIP

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DS20006653B-page 8

MIC2133

Phase Shedding

Phase Shedding Exit Threshold

VPSH_EXIT

170

244

300

VPSH = 0.96V, VDROOP ramp-up

(Note 3)

Phase Shedding Entry Threshold

VPSH_ENTRY

135

195

240

VPSH = 0.96V, VDROOP

ramp-down (Note 3)

DROOP High-to-Low Transition

Time

tTRAN_HL

—

µs

MIC2133 sheds the secondary;

moving VPSH_TH from high to

0 mV, the delay of the action is

measured

PSH Current

IPSH

µA

—

PSH Current Tempco

TCIPSH

—

ppm/ºC Note 2

Output Overvoltage Protection (DR)

OVP Threshold

VOVP_TH

0.64

0.67

0.7

OVP is activated after UVLO

goes high and VFBS soft start

OVP Deglitch Timer

tDEGLITCH

—12

—

µs

—

DR Output High RDSON

RON_DRH

—30

—

Ω

IDR = 10 mA

DR Output Low RDSON

RON_DRL

—25

—

Ω

IDR = 10 mA

DR Rise Time

tR_DR

—

160

—

CLOAD = 1 nF (Note 2)

Temperature Sense

Thermal Sense Gain

GTS

—6

—

mV/°C —

Thermal Sense Offset Voltage

VOS_TS

—1.8

—

VIN = VDD = 5V (Note 2)

Thermal Sense Nonlinearity

TSNL

—

±6

—

°C

TEMP = -40°C to +125°C,

ensured by design and

measured at characterization

Thermal Shutdown

Thermal Shutdown Threshold

TSD

—

160

—

°C

TJ Rising (Note 2)

Thermal Shutdown Hysteresis

TSD_HYS

—20

—

°C

Note 2

ELECTRICAL CHARACTERISTICS(1) (CONTINUED)

Electrical Characteristics: VIN =12V; VOUT =5V; fSW = 500 kHz/phase; VBST – VSW =5V; TA = +25°C; unless noted.

Boldface values indicate -40°C ≤ TJ ≤ +125°C.

Parameters

Symbol

Min.

Typ.

Max.

Units

Conditions

Note 1: Specification for packaged product only.

2: Ensured by design and characterization. Not production tested.

3: Measured in Test mode.

4: The maximum duty cycle is limited by the fixed mandatory off-time of typically 360 ns.

5: Limited by maximum junction temperature TJ = +125°C.

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