MIC4782 datasheet(4/23 Pages) MICREL

4 / 23 page

Micrel, Inc.

MIC4782

August 2009

M9999-081709-D

Absolute Maximum Ratings(1)

Supply Voltage (VIN)..................................... –0.3V to +6.5V

Output Switch Voltage (VSW1, VSW2).............. –0.3V to +6.5V

Output Switch Current (ISW1, ISW2)………...Internally Limited

Input Voltage (VEN), (VFB), (VBIAS) .......................-0.3V to VIN

Storage Temperature (Ts) .........................–60°C to +150°C

Junction Temperature ................................................ 150°C

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

ESD Rating

(3)................................................................. 2KV

Operating Ratings(2)

Supply Voltage (VIN)........................................... +3V to +6V

Logic Input Voltage (VEN) ....................................... 0V to VIN

Junction Temperature (TJ) ........................–20°C to +125°C

Junction Thermal Resistance

3mm x 3mm MLF

® (θJA).....................................60°C/W

Electrical Characteristics(4)

VIN = VEN = 3.6V; L = 1.0µH; COUT = 4.7µF; TA = 25°C, unless noted. Bold values indicate –20°C< TJ < +125°C.

Parameter

Condition

Min

Typ

Max

Units

Supply Voltage Range

3.0

6.0

Under-Voltage Lockout Threshold

Turn-on

2.45

2.6

2.7

UVLO Hysteresis

100

VFB = 0.9 * VNOM (not switching); VIN = 6V

1.4

3.0

Quiescent Current

VFB = 0.9 * VNOM (not switching); VIN = 3.6V

1.0

Shutdown Current

VEN = 0V

1.6

µA

[Adjustable] Feedback Voltage

± 3%, ILOAD = 100µA

589

607

625

FB pin input current

Current Limit

VFB = 0.9 * VNOM

2.5

4.3

Output Voltage Line Regulation

VIN = 3V to 6V; ILOAD= 100 µA

0.07

Output Voltage Load Regulation

20mA < ILOAD < 2A

0.2

Maximum Duty Cycle

VFB ≤ 0.9 * VNOM

100

Switch ON-Resistance

ISW = 50mA VFB =GND

155

mΩ

Oscillator Frequency

1.8

MHz

Switching Phase

180

Deg

Enable Threshold

0.5

0.9

1.3

Enable Hysteresis

Enable Input Current

0.1

µA

Over-Temperature Shutdown

153

°C

Over-Temperature 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. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.

4. Specification for packaged product only.

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