SC4524SETRT データシートの表示（PDF） - Semtech Corporation

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SC4524SETRT

Programmable Frequency, 2A Output 30V Step-Down Switching Regulator

Semtech Corporation 

SC4524

POWER MANAGEMENT

Electrical Characteristics (Cont.)

Unless specified: -40°C < TA < 85°C, -40°C < TJ< 105°C, ROSC = 12.1kΩ, VIN = 5V, VBST = 8V

Parameter

Conditions

Min

Typ

Max Units

Error Amplifier Open-Loop Gain

COMP Source Current

COMP Sink Current

COMP Pin to Switch Current Gain

COMP Switching Threshold

COMP Maximum Voltage

Switching Frequency

Maximum Duty Cycle

Switch Current Limit

Switch Saturation Voltage

Switch Leakage Current

Minimum BST Voltage

BST Pin Current

Minimum Soft-Start Voltage to Exit

Shutdown

Soft-start Charging Current

Soft-start Discharging Current

Minimum Soft-start Voltage to

Enable Overload Shutoff

FB Overload Threshold

Soft-start Voltage to Restart

Switching After Overload Shutoff

Thermal Shutdown Temperature

Thermal Shutdown Hysteresis

VFB = 0.8V, VCOMP = 1.5V

VFB = 1.2V, VCOMP = 1.5V

VFB = 0.9V

(Note 2)

(Note 1)

ISW = -2A

ISW = -2A

ISW = -0.5A

ISW = -2A

VSS = 0V

VSS = 1.5V

VSS = 1.5V

VSS Rising

VSS = 2.3V, VFB Falling

VSS Falling

53

dB

20

µA

20

µA

8

A/V

0.7

1.1

1.3

V

2.2

V

1.2

1.4

1.6

MHz

80

90

%

2.3

3.2

A

0.3

V

10

µA

1.8

2.5

V

20

mA

60

mA

0.2

0.4

0.7

V

2

µA

1.8

µA

0.8

µA

2

V

0.7

V

0.7

1

1.3

V

155

°C

10

°C

Notes: (1) Guaranteed by design, not tested in production.

(2) The maximum duty cycle specified corresponds to 1.4MHz switching frequency. Duty cycles higher than those specified can be

achieved by lowering the operating frequency.

 2006 Semtech Corp.

3

www.semtech.com

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