Datasheet > MIC33M356

MIC33M356

更新时间： 2023-12-06 20:11:26

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
44页	1028K
描述
The MIC33M356 is a high-efficiency, low-voltage input, 3A Continuous current synchronous step-down

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MIC33M356 数据手册

MIC33M356

(1,2)

ELECTRICAL CHARACTERISTICS

(CONTINUED)

Electrical Specifications: Unless otherwise specified, PV_IN= 5V; V_OUT= 1.0V, C_OUT= 47 µF, T_A= +25°C.

Boldface values indicate -40°C  T_J +125°C.

Parameter

Symbol

Min.

Typ.

Max.

Units

Conditions

Internal DAC Slew Rate (Four Bits)

Slew Rate Time (Time to 1V)

T_RISE

100

250

200

400

300

550

µs/V SLEW_RATE[3:0] = 0000

µs/V SLEW_RATE[3:0] = 0001

µs/V SLEW_RATE[3:0] = 0010

µs/V SLEW_RATE[3:0] = 0011; default

µs/V SLEW_RATE[3:0] = 0100

µs/V SLEW_RATE[3:0] = 0101

µs/V SLEW_RATE[3:0] = 0110

µs/V SLEW_RATE[3:0] = 0111

µs/V SLEW_RATE[3:0] = 1000

µs/V SLEW_RATE[3:0] = 1001

µs/V SLEW_RATE[3:0] = 1010

µs/V SLEW_RATE[3:0] = 1011

µs/V SLEW_RATE[3:0] = 1100

µs/V SLEW_RATE[3:0] = 1101

µs/V SLEW_RATE[3:0] = 1110

µs/V SLEW_RATE[3:0] = 1111

400

600

800

600

800

1000

1250

1450

1700

1900

2150

2350

2600

2800

3020

3250

3480

3710

750

1000

1200

1400

1600

1800

2000

2200

2400

2600

2800

3000

3200

950

1100

1300

1450

1650

1800

2000

2180

2350

2520

2690

T_ONControl/Switching Frequency (Two Bits)

Switching On Time

T_ON

—

260

180

130

105

1.7

—

V_OUT= 1V, TON[1:0] = 00

V_OUT= 1V, TON[1:0] = 01

V_OUT= 1V, TON[1:0] = 10

V_OUT= 1V, TON[1:0] = 11

Switching Frequency

FREQ

MHz V_OUT= 1V, TON[1:0] = 10,

I_OUT= 3A

—

2.2

—

MHz V_OUT= 3.3V, TON[1:0] = 10,

I_OUT= 3A

Maximum Duty Cycle

DCMAX

I_{LIM_HS}

I_{LIM_LS}

100

Short-Circuit Protection

High-Side MOSFET Forward

Current Limit (Note 3)

2.1

4.0

—

3.5

5.0

3.0

4.2

-3

4.9

6.5

—

ILIM = 0

ILIM = 1

ILIM = 0

ILIM = 1

Low-Side MOSFET Forward

Current Limit (Note 3)

—

Low-Side MOSFET Negative

Current Limit

I_{LIM_NEG}

I_{ZC_TH}

HICCUP

—

-2

-4

N-Channel Zero-Crossing

Threshold

—

0.9

—

Current Limit Pulses before

Hiccup

Cycles

Hiccup Period before Restart

Note 1: Specification for packaged product only.

2: Characterized in open loop.

3: Tested in open loop. The closed-loop current limit is affected by inductance value, input voltage and

temperature.

 2020 Microchip Technology Inc.

DS20006349A-page 7

1...4 5 678 9 10...44

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