ADP2503 datasheet(3/16 Pages) AD

Part #	ADP2503

Description	600 mA/1000 mA, 2.5 MHz Buck-Boost DC-to-DC Converter

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Manufacturer	AD [Analog Devices]

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Preliminary Technical Data

ADP2503/ADP2504

SPECIFICATIONS

VIN = 3.6 V, VOUT = 3.3 V, @ TA = TJ = −40°C to +125°C for minimum/maximum specifications and TA = +25°C for typical specifications,

unless otherwise noted.1

Table 1.

Parameters

Conditions

Min

Typ

Max

Unit

INPUT CHARACTERISTICS

Input Voltage Range

2.3

5.5

V

Undervoltage Lockout Threshold

VIN rising

2.2

2.25

2.3

V

Undervoltage Lockout Threshold

VIN falling

2.13

2.18

2.23

V

OUTPUT CHARACTERISTICS

Output Voltage Range

2.8

5.0

V

Feedback Voltage

0.495

0.5

0.55

V

Feedback Impedance

450

kΩ

Output Voltage Initial Accuracy

(PWM Mode, No Load)

ADP2503/ADP2504 (PWM operation, no load)

−2

+2

%

Load and Line Regulation

VIN = 2.3 V to 3.6 V, ILOAD = 0mA to 500mA, forced PWM mode

0.5

%

VIN = 2.3 V to 5.5 V, ILOAD = 0mA to 500mA, forced PWM mode

0.6

%

CURRENT CHARACTERISTICS

Quiescent Current (VIN)

Shutdown Current

IOUT = 0 mA, V mode = EN = VIN = 3.6 V, device not switching

TA = TJ = −40°C to +85°C

38

50

0.2

1

μA

SWITCH CHARACTERISTICS

N-Channel Switches (LFCSP)

VIN = 3.6 V

150

mΩ

P-Channel Switches (LFCSP)

VIN = VOUT = 3.6 V

150

mΩ

P-Channel Leakage

Switch Current Limit

TJ = −40°C to +85°C

1

μA

ADP2504

1.3

2.0

A

ADP2503

1.0

1.4

A

Reverse Current Limit

1.1

A

OSCILLATOR AND STARTUP

Oscillator Frequency

VIN = 2.3 V to 5.5 V

2.2

2.5

2.8

MHz

On Time PMOS1 (Buck Mode)

Minimum duty cycle = 30%

130

ns

On Time NMOS2 (Boost Mode)

Maximum duty cycle = 50% (×2)

200

ns

Sync Clock Frequency

2.2

2.8

MHz

Sync Clock Minimum Off Time

160

ns

Soft Start Period

200

μs

LOGIC LEVEL CHARACTERISTICS

EN, SYNC Input High Threshold

1.2

V

EN, SYNC Input Low Threshold

0.4

V

EN, SYNC Leakage Current

−1

+0.1

+1

μA

THERMAL CHARACTERISTICS

Thermal Shutdown Threshold

Thermal Shutdown Hysteresis

150

25

°C

1 All limits at temperature extremes are guaranteed via correlation using standard statistical quality control (SQC).

Rev. PrB | Page 3 of 16

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