MMM5062 datasheet(3/22 Pages) FREESCALE

3 / 22 page

Micrel, Inc.

MIC22950

February 2010

M9999-021910-B

Absolute Maximum Ratings

(1)

Supply Voltage (PVIN, SVIN)..............................

−0.3V to +6V

Output Switch Voltage (VSW) ........................... −0.3V to +6V

Output Switch Current (ISW) ......................Internally Limited

Logic Input Voltage (VEN, VPOR, VDLY)................. –0.3V to VIN

Control Voltage (CF, RC, COMP, FB) .................... –0.3V to VIN

Lead Temperature (soldering, 10sec.)....................... 260°C

Storage Temperature (Ts).........................–65°C to +150°C

Operating Ratings

(2)

Supply Voltage (VIN)......................................... 2.6V to 5.5V

Junction Temperature (TJ) ..................–40°C ≤ TJ ≤ +125°C

Thermal Resistance

MLF

® (θJC)..........................................................11°C/W

MLF

® (θJA)..........................................................30°C/W

Electrical Characteristics

(3)

TA = 25°C with VIN = VEN = 3.3V; VOUT = 1.8V, unless otherwise specified. Bold values indicate –40°C ≤ TJ ≤ +125°C.

Parameter

Condition

Min.

Typ.

Max.

Units

Supply Voltage Range

2.6

5.5

VIN Turn On Voltage Threshold

(VIN Rising)

2.35

2.5

2.6

UVLO Hysteresis

260

Quiescent Current (PWM Mode)

VEN = >1.34V; VFB = 1.1*VNOM (not switching)

Shutdown Current

VEN = 0V

µA

[Adjustable] Feedback Voltage

± 2% (over temperature)

0.686

0.714

FB pin input current

Current Limit

VFB = 0.9*VNOM

16.5

Output Voltage Line Regulation

VOUT 1.8V; VIN = 2.6 to 5.5V, ILOAD = 100mA

0.2

Output Voltage Load Regulation

100mA < ILOAD < 10A, Vin = 3.3V

0.2

Maximum Duty Cycle

VFB ≤ 0.5V

100

Switch ON-Resistance PFET

Switch ON-Resistance NFET

ISW = 1000mA VFB=0.5V

ISW = -1000mA VFB=0.9V

mΩ

Oscillator Frequency

CF = 390pF

325

510

610

kHz

EN/DLY threshold voltage

1.14

1.24

1.34

EN/DLY source current

VIN = 2.6 to VIN = 5.5V

0.6

1.8

µA

RC Pin IRAMP

Ramp Control Current

0.6

1.8

µA

Power On Reset IPG(LEAK)

VPORH = 5.5V; POR = High

µA

Output Logic-Low Voltage (undervoltage condition),

IPOR = 5mA

Power On Reset VPG(LO)

Hysteresis

Power On Reset VPG

Threshold, % of VOUT below nominal

7.5

12.5

Over-temperature Shutdown

160

°C

Over-temperature Shutdown Hysteresis

°C

Notes:

1. Exceeding the absolute maximum rating may damage the device.

2. The device is not guaranteed to function outside its operating rating.

3. Specification for packaged product only.

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