MIC5259-2.5BD5 查看數據表（PDF） - Micrel

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MIC5259-2.5BD5

300mA High PSRR, Low Noise µCap CMOS LDO

Micrel 

Micrel, Inc.

Absolute Maximum Ratings(1)

Supply Input Voltage (VIN).................................... 0V to +7V

Enable Input Voltage (VEN)................................... 0V to +7V

Power Dissipation (PD) ........................... Internally Limited(3)

Junction Temperature (TJ) ........................–40°C to +125°C

Storage Temperature (TS)........................... –65°C to 150°C

Lead Temperature (soldering, 5sec.)......................... 260°C

EDS Rating(4).................................................................. 2kV

MIC5259

Operating Ratings(2)

Supply voltage (VIN) ........................................ +2.7V to +6V

Enable Input Voltage (VEN)..................................... 0V to VIN

Junction Temperature (TJ) ........................ –40°C to +125°C

Thermal Resistance

TSOT-23 (θJA)..................................................235°C/W

2x2 MLF® (θJA)...................................................90°C/W

Electrical Characteristics(5)

VIN = VOUT + 1V; VEN = VIN; IOUT = 100µA; TJ = 25°C, bold values indicate –40°C< TJ < +125°C, unless noted.

Symbol

Parameter

Condition

Min Typ Max

VO

Output Voltage Accuracy

IOUT = 100µA

–1.5

1.5

–3

3

∆VLRN

∆VLDR

VIN – VOUT

Line Regulation

Load Regulation

Dropout Voltage(7)

VIN = VOUT + 1V to 6V

IOUT = 0.1mA to 300mA(6)

IOUT = 150mA

IOUT = 300mA

–0.3 0.02

0.3

0.6

3.0

150

300

500

550

IQ

Quiescent Current

IGND

Ground Pin Current(8)

VEN ≤ 0.4V (shutdown)

IOUT = 0mA

0.2

1

105

150

IOUT = 300mA

120

250

PSRR

Ripple Rejection; IOUT = 150mA f = 10Hz, COUT = 1.0µF, CBYP = 0.01µF

65

f = 10Hz, VIN = VOUT + 0.3V

53

f = 10kHz, VIN = VOUT + 0.3V

53

ILIM

Current Limit

VOUT = 0V

350 475

en

Output Voltage Noise

COUT 1.0µF, CBYP = 0.01µF,

30

f = 10Hz to 100kHz

Enable Input

VIL

Enable Input Logic-Low Voltage VIN = 2.7 to 5.5V, regulator shutdown

VIH

Enable Input Logic-High Voltage VIN = 2.7V to 5.5V, regulator enabled

IEN

Enable Input Current

VIL ≤ 0.4V, regulator shutdown

VIH ≥ 1.6V, regulator enabled

Shutdown Resistance Discharge

0.4

1.6

0.01

1

0.01

1

500

Thermal Protection

Thermal Shutdown Temperature

150

Thermal Shutdown Hysteresis

10

Units

%

%

%/V

%

mV

mV

mV

µA

µA

µA

dB

dB

dB

mA

µV(RMS)

V

V

µA

µA

Ω

°C

°C

Notes:

1. Exceeding the absolute maximum rating may damage the device.

2. The device is not guaranteed to function outside its operating rating.

3. The maximum allowable power dissipation of any TA (ambient temperature) is PD(max) = (TJ(max) – TA) / θJA. Exceeding the maximum allowable power

dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. The θJA of the MIC5259-x.xBM5 (all versions) is

235°C/W on a PC board. See “Thermal Considerations” section for further details.

4. Devices are ESD sensitive. Handling precautions recommended.

5. Specification for packaged product only.

6. Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load range

from 0.1mA to 300mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.

7. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value measured at 1V differential.

For outputs below 2.7V, dropout voltage is the input-to-output voltage differential with the minimum input voltage 2.7V. Minimum input operating

voltage is 2.7V.

8. Ground pin current is the regulator quiescent current. The total current drawn from the supply is the sum of the load current plus the ground pin

current.

September 2006

3

M9999-091406

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