TJ3212 参数 Datasheet PDF下载

DDR VDDQ and VTT Termination Voltage Regulator

ELECTRICAL CHARACTERISTICS

Parameters

Supply Voltage Range

Quiescent Current

ADJSD Voltage

Shutdown Current

ADJSD Logic High

ADJSD Logic Low

Under-voltage Lockout

Thermal SHDN Threshold

Thermal SHDN Hysteresis

V

DDQ

, V

TT

TEMPCO

VDDQ Regulator

VDDQ Output Voltage

VDDQ Load Regulation

VDDQ Line Regulator

VDDQ Dropout Voltage

ADJSD Bias Current

VDDQ Current Limit

VTT Regulator

VTT Output Voltage

VTT Load Regulation

VTT Line Regulator

ITT Current Limit

VTT Shutdown Leakage

Current

Reference Voltage

V

TT DEF

V

TT LOAD

V

TT LINE

I

TT LIM

I

VTT OFF

V

REF

I

TT

= 100mA

Source, 10mA

≤

I

TT

≤

2A

(4)

(4)

Sink, -2A

≤

I

TT

≤

10mA

3.0V

≤

V

IN

≤

3.6V, I

TT

= 0.1A

Source / Sink

(4)

V

EN_VTT

= 0.4V (shutdown)

C

REF

= 0.1uF, I

REF

= 100uA

1.225

1.250

± 2.0

1.225

-30

1.250

10

-10

5

± 2.5

10

V

DDQ EDF

V

DDQ LOAD

V

DDQ LINE

V

DROP

I

ADJ

I

DDQ LIM

I

DDQ

= 100mA

10mA

≤

I

DDQ

≤

2A

(4)

3.0V

≤

V

IN

≤

3.6V, I

DDQ

= 0.1A

I

DDQ

= 2A

(5)

(3)

TJ3212

Symbol

V

IN

I

Q

V

ADJSD

I

SHDN

SHDN_H

SHDN_L

UVLO

T

OVER

T

HYS

TEMPCO

I

OUT

= 1A

(3)

Condition

Min.

3.0

Typ.

Max.

3.6

Unit

V

mA

I

DDQ

= 0, I

TT

=0

(3)

2

1.225

1.250

0.1

2.7

1.5

2.40

150

2.70

170

50

100

2.90

1.275

V

mA

V

V

V

°C

°C

ppm/°C

V

ADJSD

= 3.3V (shutdown)

(2)

(3)

Hysteresis = 100mV

(3)

(3)

2.450

2.500

10

5

500

0.8

2.550

25

25

V

mV

mV

mV

3

uA

A

2.0

2.5

1.275

30

15

V

mV

mV

mV

A

uA

V

1.275

Note 1. VIN = 3.3V, VDDQ = 2.50V, VTT = 1.25V (default values), CDDQ=CTT=47 F, TA = 25°C unless otherwise specified.

Note 2. The ADJSD Logic High value is normally satisfied for full input voltage range by using a low leakage current (below 1 A).

Schottky diode at ADJSD control pin.

Note 3. Guaranteed by design.

Note 4. Load and line regulation are measured at constant junction temperature by using pulse testing with a low duty cycle. For high current

tests, correlation method can be used. Changes in output voltage due to heating effects must be taken into account separately. Load

and line regulation values are guaranteed by design up to the maximum power dissipation.

Note 5. Dropout voltage is the input to output voltage differential at which output voltage has dropped 100mV from the nominal value obtained

at 3.3V input. It depends on load current and junction temperature. Guaranteed by design.

Mar. 2011 - Preliminary

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6

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HTC