MIC2250YML datasheet(3/14 Pages) MICREL

3 / 14 page

Micrel, Inc.

MIC2250

April 2011

M9999-041811-B

Absolute Maximum Ratings

(1)

Supply Voltage (VIN).........................................................6V

Switch Voltage (VSW)....................................... –0.3V to 34V

Enable Voltage (VEN)......................................... –0.3V to VIN

FB Voltage (VFB)...............................................................6V

Switch Current (ISW) ......................................................3.5A

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

ESD Rating

(4)................................................. ESD Sensitive

Operating Ratings

(2)

Supply Voltage (VIN)......................................... 2.5V to 5.5V

Enable Voltage (VEN).............................................. 0V to VIN

Junction Temperature (TJ)

(3) .....................–40°C to +125°C

Junction Thermal Resistance

2mm x 2mm MLF®-8 (

θJA)..................................90°C/W

Electrical Characteristics

(5)

VIN = VEN = 3.6V; VDITH = 0V; VOUT = 15V; IOUT = 40mA; TA = 25°C, unless otherwise noted. Bold values indicate

–40°C ≤ TJ ≤ +85°C.

Symbol

Parameter

Condition

Min

Typ

Max

Units

VIN

Input Voltage Range

2.5

5.5

VULVO

Under-voltage Lockout

VIN rising

1.8

2.4

Quiescent Current

VFB = 1.5V (not switching)

µA

ISD

Shutdown Current

VEN = 0V, Note 6

0.1

µA

1.20

1.24

1.277

VFB

Feedback Voltage

–40°C ≤ TJ ≤ +85°C

1.19

1.29

IFB

Feedback Input Current

VFB = 1.24V

PFM Operation

Tss

Soft Start time

tSW

Switch Off-time

VIN = 3.6V

1.6

µs

DMAX

Maximum Duty Cycle

tDITH

Off-time Dithering

VDITH = 3.6V. Percentage from nominal.

±20

Line Regulation

3V ≤ VIN ≤ 5V

0.3

Load Regulation

1mA ≤ IOUT ≤ 40mA

0.1

ISW

Switch Current Limit

Note 7

0.9

RON

Switch ON-resistance

ISW = 200mA

0.5

Ω

ISW

Switch Leakage Current

VEN = 0V, VSW = 10V

0.01

µA

Turn ON

1.5

VEN,

VDITH

Logic Input Thresholds

Turn OFF

0.4

IEN

Enable Pin Current

VEN = VIN = 5.0V

0.1

µA

130

°C

Thermal Shutdown Threshold

Hysteresis

°C

Notes:

1. Absolute maximum ratings indicate limits beyond which damage to the component may occur.

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

3. The maximum allowable power dissipation is a function of the maximum junction temperature, TJ(Max), the junction-to-ambient thermal resistance, θ JA,

and the ambient temperature, TA. The maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into

thermal shutdown.

4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.

5. Specification for packaged product only.

6. ISD = IVIN.

7. Guaranteed by design.

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