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AMS4155

2A OUTPUT PWM BUCK CONVERTER

Advanced Monolithic Systems Inc 

ABSOLUTE MAXIMUM RATINGS

VIN

28V

F/B

-0.3V to +6V

EN

-0.3V to +6V

BST

VLX + 6V

LX

COMP

SYNC

Junction Temperature

Storage Temperature

Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at TA= 25 °C and VIN=12V (unless otherwise noted).

PARAMETER

TEST CONDITIONS

Feedback Voltage

Switch On Resistance

Switch Leakage

Current Limit (1)

Current Amplifier Gain

Error Amplifier Voltage Gain

Error Amplifier Transconductance

Oscillator Frequency

Sync Frequency

Maximum Duty Cycle

Minimum Duty Cycle

Enable Threshold

Enable Hysteresis

Enable Pull-up Current

Under Voltage Lockout

Threshold Rising

Under Voltage Lockout

Threshold Hysteresis

Supply Current (Shutdown)

Supply Current (Quiescent)

Thermal Shutdown

4.75V ≤ VIN ≤ 20V, VCOMP < 2V

VEN = 0V; VLX = 0V

∆IC = ± 10µA

Sync Drive 0.5V to 2.7V

VFB = 1.0V

VFB = 1.5V

VEN ≤ 0.4V

VEN ≥ 2.8V; VFB = 1.5V

Note:

1) Equivalent output current = 1.5A ≥ 50% Duty Cycle

2.0A ≤ 50% Duty Cycle

Assumes ripple current = 30% of load current.

AMS4155

-1V to +28V

-0.3V to +6V

-0.3v to +6V

+150°C

-65°C to +150°C

260°C

AMS4155

Min. Typ. Max.

Units

1.215

3.4

420

0.460

2.2

1.255

0.18

0

4

1.9

400

730

460

85

2.475

220

0.7

1.285

10

6

500

1.1

3.2

2.55

2.4

2.5

2.6

200

17

25

0.95 1.1

153

V

Ω

µA

A

A/V

V/V

µA/V

KHz

MHz

%

%

V

mV

µA

V

mV

µA

mA

°C

Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723

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