AAT2842 datasheet(5/21 Pages) ANALOGICTECH

No. de pieza	AAT2842

Descripción Electrónicos	High-Current Charge Pump with S2Cwire??Control and Dual LDO for Backlight and Flash

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AAT2842

High-Current Charge Pump with S2Cwire™

Control and Dual LDO for Backlight and Flash

2842.2006.10.1.0

5

Electrical Characteristics1

VIN = 3.6V; CIN = 4.7µF; COUT = 2.2µF; C1 = C2 = 1.0µF; TA = -40°C to +85°C, unless otherwise noted. Typical

values are at TA = 25°C.

Symbol

Description

Conditions

Min Typ Max Units

VIN

IN Operating Voltage Range

2.7

5.5

V

1X Mode, 3.0V

≤ VIN ≤ 5.5V, Active, No

1.0

Load; ENL = AGND, FENS = BENS = IN

1.5X Mode, 3.0V

≤ VIN ≤ 5.5V, Active, No

3.0

IIN(Q)

IN Operating Current

Load; ENL = AGND, FENS = BENS = IN

mA

2X Mode, 3.0V

≤ VIN ≤ 5.5V, Active, No

5.0

Load; ENL = AGND, FENS = BENS = IN

RBSET = 280kΩ, Data 1, 1X Mode

50

µA

IIN(SHDN)

IN Shutdown Current

ENL = BENS = FENS = AGND, TA = 25°C

5.0

µA

TSD

Over-Temperature Shutdown

140

°C

Threshold

TSD(HYS)

Over-Temperature Shutdown

15

°C

Hysteresis

Charge Pump Section

IOUT

OUT Maximum Output Current

600

mA

VIN(TH_H)

BL1-BL4, FL1-FL4 Charge Pump RBSET = 280kΩ, Data 1

500

mV

Mode Transition Hysteresis

fOSC

Charge Pump Oscillator

2

MHz

Frequency

Backlight LED Outputs, S2Cwire Data = 1

IBL_(MAX)

BL1-BL4 Maximum Current

RBSET = 280kΩ, VIN - VF = 1.5V

27

30

33

mA

ΔI(BL_)

BL1-BL4 Current Matching2

VIN - VF = 1.5V

0.5

1

%

VBL_(TH)

BL1-BL4 Charge Pump Mode

150

mV

Transition Threshold

Backlight LED Outputs, S2Cwire Data = 7

IBL_(MAX)

BL1-BL4 Maximum Current

RBSET = 280kΩ, VIN - VF = 1.5V

8.6

9.6

10.6

mA

ΔI(BL_)

BL1-BL4 Current Matching2

VIN - VF = 1.5V

2

%

VBL_(TH)

BL1-BL4 Charge Pump Mode

60

mV

Transition Threshold

Flash LED Outputs, S2Cwire Data = 1

IFL_(MAX)

FL1-FL4 Maximum Current

RFSET = 280kΩ, VIN - VF = 1.5V

135

150

165

mA

ΔI(FL_)

FL1-FL4 Current Matching2

VIN - VF = 1.5V

1

4

%

VFL_(TH)

FL1-FL4 Charge Pump Mode

300

mV

Transition Threshold

1. The AAT2842 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured

by design, characterization, and correlation with statistical process controls.

2. Current matching is defined as the deviation of any sink current from the average of all active channels.

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