MIC2124YMM datasheet(3/24 Pages) MICREL

3 / 24 page

Micrel, Inc.

MIC2124

June 2010

M9999-060810-D

Absolute Maximum Ratings(1)

IN, FB to GND .................................................. -0.3V to +6V

BST to LX ......................................................... -0.3V to +6V

BST to GND ................................................... -0.3V to +35V

DH to LX.............................................-0.3V to (VBST + 0.3V)

DL, COMP to GND...............................-0.3V to (VIN + 0.3V)

HSD to GND..................................................... -0.3V to 29V

PGND to GND ............................................... -0.3V to +0.3V

Power Dissipation TA=70°C

(3)...................Internally Limited

Storage Temperature (TS)..........................-65°C to +150°C

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

Operating Ratings(2)

Input Voltage (VIN)............................................ 3.0V to 5.5V

Supply Voltage (VHSD) ....................................... 3.0V to 18V

Ambient Temperature (TA) ...........................-40°C to +85°C

Junction Temperature (TJ) .........................-40°C to +125°C

Junction Thermal Resistance MSOP (

θJA) ............130°C/W

Junction Thermal Resistance MSOP (

θJC) ..............43°C/W

Electrical Characteristics(5)

VHSD = 13.2V, VIN = 5V, VBST - VLX = 5V; TA = 25°C, unless noted. Bold values indicate -40°C ≤ TA ≤ +85°C.

Parameter

Conditions

Min

Typ

Max

Units

General

Operating Input Voltage (VIN)

(6)

3.0

5.5

HSD Voltage Range (VHSD)

3.0

Quiescent Supply Current

VFB = 1.5V

1.4

Shutdown Current

VEN/COMP = GND

Under-Voltage Lockout

Under-voltage Lockout Trip Level

Rising edge

2.5

2.7

2.93

UVLO Hysteresis

DC-DC Controller

Output-Voltage Adjust Range

(VOUT)

Depends on external components and the

maximum duty cycle.

0.8

Error Amplifier

FB Regulation Voltage

0°C ≤ TA ≤ 85°C

-1

±0.2

FB Regulation Voltage

-40°C ≤ TA ≤ 85°C

-2.5

±0.2

Transconductance gm

110

160

µS

COMP Output Voltage Swing

0.5

2.3

FB Input Leakage Current

VFB = 0.8V

500

On Timer

Switching Frequency

240

300

360

kHz

Maximum Duty Cycle

VHSD = 4V, VIN = 5V, VLX = 3.33V

Minimum Duty Cycle

FB > 0.8V

Short Current Protection

Current Limit 1

VFB = 0.8V

110

127

145

Current Limit 2

VFB = 0V

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