MIC2131 datasheet(4/20 Pages) MICREL

4 / 20 page

Micrel, Inc.

MIC2130/1

April 2008

M9999-042108-C

Absolute Maximum Ratings

(1)

Supply Voltage (VIN).......................................................42V

Boot Strapped Voltage (VBST)..................................VIN + 5V

Logic Inputs...................................................................6.5V

EN Input .........................................................................42V

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

ESD Rating

(3)...............................................................1.5kV

Operating Ratings

(2)

Supply Voltage (VIN1, VIN2)................................ +8V to +40V

Output Voltage Range.................................. 0.7V to 0.85VIN

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

Package Thermal Resistance

e-TSSOP (

θJA) ................................................97.5°C/W

e-TSSOP (

θJC) ................................................29.9°C/W

4x4 MLF-16 (

θJA) ............................................50.6°C/W

4x4 MLF-16 (

θJC) ............................................15.8°C/W

Electrical Characteristics

(4)

TJ = 25°C; VEN = VIN = 24V; Frequency = 150kHz; VOUT = 3.3V, unless otherwise specified.

Bold

values indicate –40°C≤ TJ ≤ +125°C.

Parameter

Condition

Min

Typ

Max

Units

VIN, VEN/UVLO, VDD Supply

Total Supply Current,

PWM Mode Supply Current

VFB = 0.7V; Comp = 3V

(Outputs switching but excluding external MOSFET gate

current.)

7.5

Shutdown Current

VEN = 0V; VIN = 12V

180

300

µA

VEN/UVLO Turn-On Threshold

1.1

1.3

VEN/UVLO Turn-Off Threshold

0.7

1.0

VIN UVLO Hysteresis

100

Internal Bias Voltages (AVDD,)

(IDD = 50mA)

4.6

5.3

Oscillator/PWM Section

PWM Frequency

MIC2130/1-1

130

150

170

kHz

PWM Frequency

MIC2130/1-4

360

400

440

kHz

Maximum Duty Cycle

MIC2130/1-1

Maximum Duty Cycle

MIC2130/1-4

Minimum On-Time

Note 5

Regulation

Feedback Voltage Reference

(±2%) -40

°C to +125°C

686

700

714

Feedback Bias Current

300

1000

Output Voltage

Line Regulation

VIN = 8V – 40V

0.03

%/V

Output Voltage

Load Regulation

≤ IOUT ≤ 10A

0.5

Error Amplifier (each channel)

DC Gain

Output Impedance

MΩ

Transconductance

1.2

1.6

2.5

Output Over voltage Protection

VFB Threshold

(Latches LSD High)

110

115

120

%Nom

Delay Blanking Time

µs

Soft Start/HCL

Internal Soft Start

Source Current

2.75

µA

HCL (MIC2131) Pin Voltage

High

ILIMIT set to 200% when HCL charges to2.4V

2.4

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