AAT2789 参数 Datasheet PDF下载

PRODUCT DATASHEET

AAT2789

SystemPower

TM

Electrical Characteristics

1

V

IN

= 3.6V, T

A

= -40°C to 85°C, unless noted otherwise. Typical values are at T

A

= 25°C.

Symbol

Description

Conditions

Min

2.7

V

P1

Rising

V

P1

Hysteresis

V

P1

Falling

I

OUT1

= 0A to 1.7A; V

P1

= 2.7V to 5.5V

No load, V

EN1

= V

P1

, V

EN2

= AGND

V

EN1

= GND

250

1.7

0.6

-3.0

42

1800

120

85

0.5

0.2

1.12

From Enable-1 to Output-1 Regulation

2.7

V

P2

Rising

V

P2

Hysteresis

V

P2

Falling

I

OUT2

= 0A to 800mA, V

P2

= 2.7V to 5.5V

No load, V

EN2

= V

P2

, V

EN1

= AGND

V

EN2

= GND

100

1.7

0.6

-3.0

37

900

330

275

0.5

0.1

0.9

From Enable-2 to Output-2 Regulation

2.0

150

140

15

0.6

1.4

-1.0

1.0

2.6

V

P2

3.0

70

1.0

1.40

150

1.68

V

P1

3.0

90

1.0

Low Noise, High Frequency Dual Step-Down Converter

Typ

Max

5.5

2.4

Units

V

V

mV

V

V

%

μA

μA

mA

mΩ

mΩ

%

%/V

MHz

μs

V

V

mV

V

V

%

μA

μA

mA

mΩ

mΩ

%

%/V

MHz

μs

°C

°C

V

V

μA

Channel 1: 1700mA Step-Down Converter

V

P1

, V

CC1

Input Voltage

V

UVLO1

V

OUT1

UVLO Threshold

Output Voltage Range

Output Voltage Tolerance

Quiescent Current

Shutdown Current

Current Limit

High Side On-Resistance

Low Side On-Resistance

Load Regulation

V

OUT1(TOL)

I

Q1

I

SHDN1

I

LIM1

R

DSON(H)1

R

DSON(L)1

ΔV

LOADREG1

ΔV

LINEREG1

/

Line Regulation

ΔV

P1

F

OSC1

Oscillator Frequency

T

S1

Start-Up Time

Channel 2: 800mA Step-Down Converter

Input Voltage

V

P2

, V

CC2

V

UVLO2

UVLO Threshold

I

OUT1

= 0A to 1.7A

V

P1

= 2.7V to 5.5V

5.5

2.7

V

OUT2

Output Voltage Range

V

OUT2(TOL)

Output Voltage Tolerance

I

Q2

Quiescent Current

I

SHDN2

Shutdown Current

I

LIM2

Current Limit

R

DSON(H)2

High Side On-Resistance

Low Side On-Resistance

R

DSON(L)2

ΔV

LOADREG2

Load Regulation

ΔV

LINEREG2

/

Line Regulation

ΔV

P2

F

OSC2

Oscillator Frequency

T

S2

Start-Up Time

Over-Temperature, EN Logic

Over-Temperature Shutdown Threshold

T

SD1,2

Over-Temperature Shutdown Hysteresis

V

EN1,2(L)

Enable Threshold Low

V

EN1,2(H)

Enable Threshold High

Input Low Current

I

EN(1,2

I

OUT2

= 0mA to 800mA

V

P2

= 2.7V to 5.5V

1. The AAT2789 is guaranteed to meet performance specifications over the –40°C to +85°C operating temperature range, and is assured by design, characterization and correla-

tion with statistical process controls.

4

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