UZ1085-XX-TN3-A-T中文资料

UNISONIC TECHNOLOGIES CO., LTD

UZ1085 LINEAR INTEGRATED CIRCUIT

3A ADJUSTABLE/FIXED LOW DROPOUT LINEAR REGULATOR

DESCRIPTION

The UZ1085-xx series are low dropout three-terminal regulators with 3A output current capability. These devices have been optimized for low voltage applications including VTT bus termination, where transient response and minimum input voltage are critical.

Current limit is trimmed to ensure specified output current andcontrolled short-circuit current. On-chip thermal limiting providesprotection against any combination of overload and ambient temperature that would create excessive junction temperatures.

FEATURES

*Fast transient response

*Low dropout voltage at up to 3A *Load regulation:0.05% typical *Trimmed current limit *On-chip thermal limiting

*Pb-free plating product number: UZ1085L-xx

ORDERING INFORMATION

Order Number Pin Assignment

Package Packing

Normal Lead Free Plating

A/G ReelA/G A/G ReelA/G A/G ReelA/G Note: 1. xx: Output Voltage, refer to Marking Information.

MARKING INFORMATION

THERMAL DATA

ΘJC Thermal Resistance Junction-Case °C/W TO-263

4

ABSOLUTE MAXIMUM RATINGS

SYMBOLUNITInput Voltage VIN(VIN – VOUT) * IOUT See Figure 1

℃ Junction Temperature TJ℃ Operating Temperature T -20 ~ +85

℃ Storage Temperature TSTG -40 ~ +150 Note 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.

Absolute maximum ratings are stress ratings only and functional device operation is not implied.

2. The device is guaranteed to meet performance specification within 0℃~+70℃ operating temperature range and assured by design from -20℃~+85℃.

ELECTRICAL CHARACTERISTICS (Ta=25℃, COUT=22μF, unless otherwise specified.)

For UZ1085-ADJ(Adjustable)

TEST MAX.UNIT

1.5V≦(VIN – VOUT)≦8.25V

V Reference Voltage VREF

10mA≦IOUT≦3A

(VOUT +1.5V) ≦VIN≦12V,

0.2Line Regulation VOUT

IOUT=10mA

0.5Load Regulation VOUT(VIN – VOUT)=3V, 10mA≦IOUT≦3A

△VREF%=1%, lOUT=3A 1.40Dropout Voltage VD

Current Limit ILIMIT (VIN-VOUT)Adjust Pin Current Iadj 35 120µA

1.5V≦（VIN – VOUT）≦12V，

Adjust Pin Current Change Iadj 10mA≦IOUT≦3A

mAMinimum Load Current IO(MIN) 1.5V≦(VIN-VOUT)≦12V

Quiescent Current IQ VINmA

f=120Hz,Tantalum,(VIN–VOUT)=3V

Ripple Rejection RR

IOUT=3A

Ta=25℃,30ms pulse Thermal Regulation 0.02%/W

Temperature Stability VOUT 1.0Long-Term Stability VOUTTa=125℃, 1000hr

Ta=25℃,10Hz≦f≦10kHz Output Noise(% of VOUTThermal Shutdown 150 °C

For UZ1085-xx(Fixed Voltage)

UZ1085-15 UZ1085-18

Output Voltage VOUT UZ1085-25

UZ1085-33 UZ1085-50

Line Regulation VOUTLoad Regulation VOUTDropout Voltage VD Current Limit ILIMIT Minimum Load Current Iadj Quiescent Current IQ

TEST MAX.UNIT

3.0V≤VIN≤8.5V, 10mA≤IOUT≤3A 3.3V≤VIN≤8.8V, 10mA≤IOUT≤3A 4.0V≤VIN≤9.5V, 10mA≤IOUT≤3AV 4.8V≦VIN≦10.3V, 10mA≦IOUT≦3A 6.5V≦VIN≦12V, 10mA≦IOUT≦3A (VOUT +1.5V)≦VIN≦12V,IOUT=10mA 0.2(VIN – VOUT)=3V, 10mA≦IOUT≦3A 0.5△VREF%=1%, lOUT=3A 1.40(VIN-VOUT)1.5V≦(VIN-VOUT)≦12V mA

VINmAf=120Hz, Tantalum,

Ripple Rejection RR

(VIN – VOUT)=3V,IOUT=3A Ta=25℃,30ms pulse Thermal Regulation 0.02%/W

Temperature Stability VOUTTa=125℃, 1000hr

Long-Term Stability VOUT1.0Ta=25℃,10Hz≦f≦10kHz Output Noise(% of VOUT°C Thermal shutdown 150

TYPICAL APPLICATION CIRCUIT

VIN=12V

9V at 3AVIN=9V

3.3V at 3A

TYPICAL CHARACTERISTICS

4

1.51.41.31.21.11.00.90.80.7

00

2

4

6

8

VIN-VOUT (V)

Figure 1. Absolute Maximum Sate Operating Area

10

12

14

0.60.5

2

1

Dropout Voltage (V)

3

IOUT (Amps)

Output Current (A)

Figure 2. Dropout Voltage vs.Output Current

0.10

1.260

1.255

Output Voltage Deviation (%

)

0.05

Reference Voltage (V)

1.2501.2451.2401.2351.2301.2251.2201.215

0-0.05-0.10

-0.15

-0.20

-75-50-25

0255075100125150175

1.210

-75-5075Junction Temperature (℃)

Figure 3. Load Regulation vs.Temperature

Junction Temperature (℃)

Figure 4. Reference Voltage vs.Temperature

3.703.65

5

3.553.503.453.403.353.303.25

3.20

Minmum Load Current (mA)

Reference Voltage (V)

3.604

3

2

1

-75-5075Junction Temperature (℃)Figure 6. Minimum Load Current vs.Temperature

Junction Temperature (℃)

Figure 5. Output Voltage vs.Temperature

TYPICAL CHARACTERISTICS(Cont.)

1009080

5.0

Short-Circuit Current (A)

70

4.5

Adjust Pin Current (¦ÌA)

60

5040302010

4.0

3.5

3.0

Junction Temperature (℃)

Figure 7. Adjust Pin Current vs.Temperature9080

20

Junction Temperature (℃)

Figure 8. Short-Circuit Current vs.Temperature

Ripple Rejections (dB)

70605040302010010

100

10k1k

Frequency (Hz)

15

Power (W)

10

5

5060708090100110120130140150

Case Temperature (℃)

Figure 10. Maximum Power Dissipation

Figure 9. Ripple Rejection vs.Frequency