MAX830CWE 데이터 시트보기 (PDF) - Maxim Integrated

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MAX830CWE

5V/3.3V/3V/Adjustable-Output, 1A, Step-Down, PWM, Switch-Mode DC-DC Regulators

Maxim Integrated 

5V/3.3V/3V/Adjustable-Output, 1A,

Step-Down, PWM, Switch-Mode DC-DC Regulators

ELECTRICAL CHARACTERISTICS (continued)

(VIN = 25V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.)

PARAMETER

SENSE Voltage

VC = 2V

CONDITIONS

SENSE Divider Resistance

TA = +25°C

SENSE Voltage Tolerance (Note 8)

VOUT (nominal) = 5V (MAX831),

3.3V (MAX832), or 3V (MAX833)

MAX831

MAX832

MAX833

MAX831

MAX832

MAX833

TA = +25°C

FB Bias Current

Reference Voltage

Reference Voltage Tolerance

(Notes 8, 9)

VFB = VREF (MAX830)

VC = 2V (MAX830) (Note 9)

VREF (nominal = 2.21V) (MAX830)

TA = +25°C

Output Voltage Line Regulation

VC Voltage

VC Voltage Temperature Coefficient

SHUT Current

SHUT Threshold

8V ≤ VIN ≤ 30V

0% duty cycle

0% duty cycle

VSHUT = 5V

VSHUT = 0.1V (shutdown)

(shutdown)

TA = +25°C

MIN

4.85

3.20

2.90

3.0

2.5

2.2

2.155

0.10

TYP

5.00

3.30

3.00

5.0

4.2

3.8

±0.5

±0.5

0.5

2.21

±0.5

±1.0

0.005

1.5

-4

10

0.20

MAX

5.15

3.40

3.10

8.0

7.0

6.5

±2.0

±3.0

2.0

2.265

±1.5

±2.5

0.020

20

50

0.50

UNIT

V

kΩ

%

µA

V

%

%/V

V

mV/°C

µA

V

Note 2: For switch currents between 0.2A and 1A, maximum switch-on voltage can be calculated via linear interpolation.

Note 3: By setting the SENSE pin to 5.5V (or the FB pin to 2.5V), the VC pin is forced to its low clamp level and the switch duty cycle

is forced to zero, approximating the zero load condition.

Note 4: Device shut down. Switch leakage current not included.

Note 5: For proper regulation, total voltage from VIN to GND must be ≥ 8V after start-up. During start-up mode, device is switching

but not regulating.

Note 6: To avoid extremely short switch-on times, the switch frequency is internally scaled down when VFB or VSENSE is less than

1.3V. Switch current limit is tested with VSENSE or VFB adjusted to give a 1µs minimum switch-on time.

Note 7:

RLIM

=







ILIM

1A

× 7.6kΩ +1kΩ



.

Typical value only. Minimum to maximum deviation in current limit will be ±30%,

comparable to that with ILIM pin open.

Note 8: All conditions of input voltage, output voltage, temperature, and load current.

Note 9: FB is at the reference voltage when the MAX830 output voltage is in regulation.

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