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您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄68098 > TC1303A-WM1EUN 0.5 A SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, PDSO10 PDF資料下載

參數(shù)資料

型號：	TC1303A-WM1EUN
元件分類：	穩(wěn)壓器
英文描述：	0.5 A SWITCHING REGULATOR, 2400 kHz SWITCHING FREQ-MAX, PDSO10
封裝：	PLASTIC, MO-187, MSOP-10
文件頁數(shù)：	37/38頁
文件大?。?/td>	756K
代理商：	TC1303A-WM1EUN

TC1303A/TC1303B/TC1303C/TC1304

DS21949C-page 8

2008 Microchip Technology Inc.

Synchronous Buck Regulator (VOUT1)

Adjustable Output Voltage Range

VOUT1

0.8

—

4.5

V

Adjustable Reference Feedback

Voltage (VFB1)

VFB1

0.78

0.8

0.82

V

Feedback Input Bias Current

(IFB1)

IVFB1

—-1.5

—

nA

Output Voltage Tolerance Fixed

(VOUT1)

VOUT1

-2.5

±0.3

+2.5

%

Line Regulation (VOUT1)VLINE-REG

—

0.2

—

%/V

VIN =VR+1V to 5.5V,

ILOAD = 100 mA

Load Regulation (VOUT1)VLOAD-REG

—0.2

—

%

VIN =VR +1.5V, ILOAD = 100 mA to

500 mA (Note 1)

Dropout Voltage VOUT1

VIN – VOUT1

—

280

—

mV

IOUT1 = 500 mA, VOUT1 =3.3V

(Note 5)

Internal Oscillator Frequency

FOSC

1.6

2.0

2.4

MHz

Start Up Time

TSS

—0.5

—

ms

TR = 10% to 90%

RDSon P-Channel

RDSon-P

—

450

—

m

Ω

IP=100 mA

RDSon N-Channel

RDSon-N

—

450

—

m

Ω

IN=100 mA

LX Pin Leakage Current

ILX

-1.0

±0.01

1.0

μA

SHDN = 0V, VIN = 5.5V, LX = 0V,

LX = 5.5V

Positive Current Limit Threshold

+ILX(MAX)

—

700

—

mA

LDO Output (VOUT2)

Output Voltage Tolerance (VOUT2)VOUT2

-2.5

±0.3

+2.5

%

Temperature Coefficient

TCVOUT

—

25

—

ppm/°C

Line Regulation

VOUT2/

VIN

-0.2

±0.02

+0.2

%/V

(VR+1V) ≤ VIN ≤ 5.5V

Load Regulation, VOUT2 ≥ 2.5V

VOUT2/

IOUT2

-0.75

-0.08

+0.75

%IOUT2 = 0.1 mA to 300 mA (Note 4)

Load Regulation, VOUT2 < 2.5V

VOUT2/

IOUT2

-0.9

-0.18

+0.9

%IOUT2 = 0.1 mA to 300 mA (Note 4)

Dropout Voltage VOUT2 > 2.5V

VIN – VOUT2

—

137

205

300

500

mV

IOUT2 = 200 mA (Note 5)

IOUT2 = 300 mA

Power Supply Rejection Ratio

PSRR

—

62

—

dB

f

≤ 100 Hz, IOUT1 = IOUT2 = 50 mA,

CIN = 0 F

Output Noise

eN

—

1.8

—

V/(Hz) f

≤ 1 kHz, IOUT2 =50mA,

SHDN1 =GND

DC CHARACTERISTICS (CONTINUED)

Electrical Characteristics: VIN1 =VIN2 = SHDN1,2 = 3.6V, COUT1 =CIN = 4.7 F, COUT2 =1F, L = 4.7 H, VOUT1 (ADJ) = 1.8V,

IOUT1 = 100 mA, IOUT2 = 0.1 mA TA = +25°C. Boldface specifications apply over the TA range of -40°C to +85°C.

Parameters

Sym

Min

Typ

Max

Units

Conditions

Note 1:

The Minimum VIN has to meet two conditions: VIN ≥ 2.7V and VIN ≥ VRX + VDROPOUT, VRX = VR1 or VR2.

2:

VRX is the regulator output voltage setting.

3:

TCVOUT2 = ((VOUT2max – VOUT2min) * 106)/(VOUT2 * DT).

4:

Regulation is measured at a constant junction temperature using low duty-cycle pulse testing. Load regulation is tested

over a load range from 0.1 mA to the maximum specified output current.

5:

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

nominal value measured at a 1V differential.

6:

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 causes the device to initiate thermal shutdown.

7:

The integrated MOSFET switches have an integral diode from the LX pin to VIN, and from LX to PGND. In cases where

these diodes are forward-biased, the package power dissipation limits must be adhered to. Thermal protection is not

able to limit the junction temperature for these cases.

8:

VIN1 and VIN2 are supplied by the same input source.

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