RT9187-11GQV datasheet(5/9 Pages) RICHTEK

Part #	RT9187-11GQV

Description	1A, Ultra-Low Dropout, Ultra-Fast CMOS LDO Regulator

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Manufacturer	RICHTEK [Richtek Technology Corporation]

Direct Link	http://www.richtek.com

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RT9187

5

DS9187-09 April 2008

www.richtek.com

Note 1.

Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. These are for

stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the operational

sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may

remain possibility to affect device reliability.

Note 2.

Devices are ESD sensitive. Handling precaution is recommended.

Note 3.

The device is not guaranteed to function outside its operating conditions.

Note 4.

The dropout voltage is defined as VIN -VOUT, which is measured when VOUT is VOUT(NORMAL) - 100mV.

Note 5.

Regulation is measured at constant junction temperature by using a 2ms current pulse. Devices are tested for load

regulation in the load range from 10mA to 1.0A.

Note 6.

Quiescent, or ground current, is the difference between input and output currents. It is defined by IQ = IIN - IOUT under no

load condition (IOUT = 0mA). The total current drawn from the supply is the sum of the load current plus the ground pin

current.

Note 7.

Standby current is the input current drawn by a regulator when the output voltage is disabled by a shutdown signal (VEN

>1.8V ).

Note 8.

Performance at -5

°C ≤ TA ≤ 85°C is assured by design.

Note 9.

θJA is measured in the natural convection at TA = 25°C on a low effective thermal conductivity test board of

JEDEC 51-3 thermal measurement standard.

Parameter

Symbol

Test C onditions

Min

Typ

Max

Units

Power Supply

Rejection Rate

f = 100Hz

PSRR

IOUT = 300mA

--

−60

--

dB

f = 10kHz

--

−50

--

Line Regulation

ΔVLINE

VIN = (VOUT+0.5) to 5.5V,

IOUT = 1mA

--

0.3

%

Start-Up Time

TStart_Up

RLOAD = 3Ω, 1nF ≤ CBP ≤ 0.1μF

--

40

--

μs

Thermal Shutdown Temperature

TSD

--

170

--

°C

Thermal Shutdown Hysteresis

ΔTSD

--

30

--

ADJ

Reference Voltage Tolerance

VREF

0.784

0.8

0.816

V

ADJ Pin Current

IADJ

VADJ = VREF

--

10

100

nA

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