MCP1754 datasheet(6/42 Pages) MICROCHIP

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MCP1754/MCP1754S

DS22276A-page 6

Output Voltage Regulation

VOUT

VR-

2.0%

VR±0.

VR+2.0

Note 2

VOUT Temperature

Coefficient

TCVOUT

—22

ppm/°C

Note 3

Line Regulation

ΔV

OUT/

(VOUTXΔVIN)

-0.05

±0.01

+0.05

%/V

VR + 1V ≤ VIN ≤ 16V

Load Regulation

ΔV

OUT/VOUT

-1.1

-0.4

%IL = 1.0 mA to 150 mA, Note 4

Dropout Voltage (Note 5)VDROPOUT

—300

500

IL = 150 mA

Dropout Current

IDO

—50

µA

VIN = 0.95VR, IOUT = 0 mA

Undervoltage Lockout

UVLO

—

2.95

—

Rising VIN

Undervoltage Lockout

Hysterisis

UVLOHYS

—

285

—

Falling VIN

Shutdown Input

Logic High Input

VSHDN-HIGH

2.4

—VIN(MAX)

Logic Low Input

VSHDN-LOW

0.0

—

0.8

Shutdown Input Leakage

Current

SHDNILK

—

0.100

0.500

2.0

µA

SHDN = GND

SHDN = 16V

Power Good Output

PWRGD Input Voltage

Operating Range

VPWRGD_VIN

1.7

—VIN

VISINK = 1 mA

PWRGD Threshold Volt-

age (Referenced to VOUT)

VPWRGD_TH

%VOUT

Falling Edge of VOUT

PWRGD Threshold

Hysteresis

VPWRGD_HYS

—2.0

—

%VOUT

Rising Edge of VOUT

PWRGD Output Voltage

Low

VPWRGD_L

—0.2

0.6

VIPWRGD_SINK = 5.0 mA,

VOUT = 0V

PWRGD Output Sink

Current

IPWRGD_L

5.0

——

VPWRGD ≤ 0.4V

PWRGD Leakage Current

IPWRGD_LK

—40

700

VPWRGD Pullup = 10 KΩ to VIN,

VIN = 16V

AC/DC CHARACTERISTICS (CONTINUED)

Electrical Specifications: Unless otherwise specified, all limits are established for VIN = VR + 1V, Note 1, ILOAD = 1 mA, COUT =

1 µF (X7R), CIN = 1 µF (X7R), TA = 25°C, tr(VIN) = 0.5V/µs, SHDN = VIN, PWRGD = 10K to VOUT.

Boldface type applies for junction temperatures, TJ (Note 7) of -40°C to +125°C.

Parameters

Sym

Min

Typ

Max

Units

Conditions

Note

The minimum VIN must meet two conditions: VIN ≥ 3.6V and VIN ≥ VR + VDROPOUT(MAX).

VR is the nominal regulator output voltage when the input voltage VIN = VRated + VDROPOUT(MAX) or ViIN = 3.6V (which-

ever is greater); IOUT = 1 mA.

TCVOUT = (VOUT-HIGH - VOUT-LOW) *10

6 / (V

R * ΔTemperature), VOUT-HIGH = highest voltage measured over the

temperature range. VOUT-LOW = lowest voltage measured over the temperature range.

Load regulation is measured at a constant junction temperature using low duty cycle pulse testing. Changes in output

voltage due to heating effects are determined using thermal regulation specification TCVOUT.

Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal VR

measured value. The nominal VR measured value is obtained with

The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction

temperature and the thermal resistance from junction to air (i.e., TA, TJ, θJA). Exceeding the maximum allowable power

dissipation will cause the device operating junction temperature to exceed the maximum 150°C rating. Sustained

junction temperatures above 150°C can impact the device reliability.

The junction temperature is approximated by soaking the device under test at an ambient temperature equal to the

desired Junction temperature. The test time is small enough such that the rise in the Junction temperature over the

ambient temperature is not significant.

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