MIC37100-1.5BM MICREL [Micrel Semiconductor], MIC37100-1.5BM Datasheet

MIC37100-1.5BM

Manufacturer Part Number

MIC37100-1.5BM

Description

1A LOW VOLTAGE U CAP LDO REGULATOR

Manufacturer

MICREL [Micrel Semiconductor]

Datasheet

1.MIC37100-1.5BM.pdf (15 pages)

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General Description

The MIC37100, MIC37101, and MIC37102 are 1A low-

dropout, linear voltage regulators that provide low-voltage,

high-current output from an extremely small package. Utiliz-

ing Micrel’s proprietary Super eta PNP™ pass element, the

MIC37100/01/02 offers extremely low dropout (typically

280mV at 1A) and low ground current (typically 11mA at 1A).

The MIC37100 is a fixed output regulator offered in the

SOT-223 package. The MIC37101 and MIC37102 are fixed

and adjustable regulators, respectively, in a thermally en-

hanced power 8-lead SOIC (small outline package) and the

SOT-223 package. The MIC37102 is also available in the S-

PAK power package, for applications that require higher

power dissipation or higher operating ambient temperatures.

The MIC37100/01/02 is ideal for PC add-in cards that need

to convert from standard 5V to 3.3V, 3.3V to 2.5V or 2.5V to

1.8V or lower. A guaranteed maximum dropout voltage of

500mV over all operating conditions allows the

MIC37100/01/02 to provide 2.5V from a supply as low as 3V

and 1.8V from a supply as low as 2.3V.

The MIC37100/01/02 is fully protected with overcurrent lim-

iting and thermal shutdown. Fixed output voltages of 1.5V,

1.65V, 1.8V, 2.5V and 3.3V are available on MIC37100/01

with adjustable output voltages to 1.24V on MIC37102.

For other voltages, contact Micrel.

All support documentation can be found on Micrel’s web

site at www.micrel.com.

Typical Applications

Super eta PNP is a registered trademark of Micrel, Inc.

PowerPC is a trademark of IBM Corporation.

September 2004

MIC37100/37101/37102

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

3.3V

2.5V/1A Regulator

MIC37100

GND

OUT

10 F

ceramic

2.5V

Features

• Fixed and adjustable output voltages to 1.24V

•

• 280mV typical dropout at 1A

• 1A minimum guaranteed output current

• 1% initial accuracy

• Low ground current

• Current limiting and thermal shutdown

• Reversed-leakage protection

• Fast transient response

• Low-profile SOT-223 package

• Power SO-8 package

• S-PAK package (MIC37102 only)

Applications

• LDO linear regulator for PC add-in cards

• PowerPC™ power supplies

• High-efficiency linear power supplies

• SMPS post regulator

• Multimedia and PC processor supplies

• Battery chargers

• Low-voltage microcontrollers and digital logic

stable

Cap Regulator, 10 F ceramic output capacitor

Ideal for 3.0V to 2.5V conversion

Ideal for 2.5V to 1.8V, 1.65V or 1.5V conversion

1A Low-Voltage Cap LDO Regulator

MIC37100/37101/37102

350

300

250

200

150

100

OUTPUT CURRENT (A)

vs. Output Current

0.25

Dropout

2.5V

0.5

3.3V

OUT

0.75

M9999-091604

Micrel

Related parts for MIC37100-1.5BM

MIC37100-1.5BM Summary of contents

Page 1

... A guaranteed maximum dropout voltage of 500mV over all operating conditions allows the MIC37100/01/02 to provide 2.5V from a supply as low as 3V and 1.8V from a supply as low as 2.3V. The MIC37100/01/02 is fully protected with overcurrent lim- iting and thermal shutdown. Fixed output voltages of 1.5V, 1 ...

Page 2

... MIC37101-3.3BM MIC37102BM MIC37101-1.5YM MIC37101-1.65YM MIC37101-1.8YM MIC37101-2.5YM MIC37101-3.3YM MIC37102YM MIC37102BR Pin Configuration GND TAB GND OUT MIC37100-x.x (Fixed) SOT-223 ( OUT 3 FLG 4 MIC37101-x.x (Fixed) SOIC-8 (M) M9999-091604 Voltage Junction Temp. Range 1.5V – +125 C 1.65V – ...

Page 3

... MIC37100/37101/37102 Pin Description Pin No. Pin No. Pin No. MIC37100 MIC37101 MIC37102 SOT-223 SOIC-8 SOIC 5–8 5–8 TAB September 2004 Pin No. Pin Name Pin Function MIC37102 S-PAK 1 EN Enable (Input): CMOS-compatible control input. Logic high = enable, logic low or open = shutdown. ...

Page 4

... MIC37100/37101/37102 Absolute Maximum Ratings Supply Voltage (V ) ........................................ 0V to +6.5V IN Enable Voltage (V ) ................................................. +6.5V EN Storage Temperature (T ) ....................... – +150 C S Lead Temperature (soldering, 5 sec.) ....................... 260 C ESD ................................................................................ (3) Electrical Characteristics 1V 2.25V bold values indicate – OUT EN J Symbol Parameter V Output Voltage OUT ...

Page 5

... MIC37100/37101/37102 Symbol Parameter MIC37102 Only Reference Voltage Adjust Pin Bias Current Notes: 1. Exceeding the absolute maximum ratings may damage the device. 2. The device is not guaranteed to function outside its operating rating. 3. Devices are ESD sensitive. Handling precautions recommended (max (max) – T ...

Page 6

... MIC37100/37101/37102 Typical Characteristics Power Supply Rejection Ratio 3.3V OUT 1000mA OUT OUT 0.01 0 100 1000 FREQUENCY (KHz) Power Supply Rejection Ratio 3. 2.5V OUT 1000mA 20 OUT OUT 0.01 0 ...

Page 7

... MIC37100/37101/37102 Ground Current vs. Supply Voltage (1.5V 1000mA 750mA INPUT VOLTAGE (V) Ground Current vs. Supply Voltage (2.5V) 1.4 1.2 1 100mA 0.8 0.6 0.4 0.2 10mA INPUT VOLTAGE (V) Ground Current vs. Supply Voltage (3.3V 750mA 10 5 500mA ...

Page 8

... MIC37100/37101/37102 Short Circuit Current vs. Temperature 1.8 1.6 1.4 2.5V IN 1.2 1.0 0.8 0.6 0.4 0.2 0.0 -40 - 100 120 TEMPERATURE ( C) Error Flag Pull-Up Resistor 6 Flag High (OK = Flag Low (FAULT 0.01 0 100 1000 10000 RESISTANCE (k ) M9999-091604 Flag Voltage vs. Flag Current 1.0 0.8 3. 0.6 2.5V IN 0.4 0 0.5 1 1.5 2 2.5 3 3.5 4 FLAG CURRENT (mA) Enable Current vs ...

Page 9

... MIC37100/37101/37102 Functional Characteristics Load Transient Response 2.5V OUT Ceramic OUT TIME (400 s/div.) Line Transient Response TIME (400 s/div.) September 2004 1000mA 100mA 5V 3. 2.5V OUT Ceramic OUT Load=100mA 9 Load Transient Response 2.5V OUT Ceramic OUT 1000mA 10mA TIME (400 s/div.) ...

Page 10

... IN FLAG EN MIC37101 MIC37101 Fixed Regulator with Flag and Enable Block Diagram IN EN MIC37102 M9999-091604 1.240V Ref. Thermal Shut- down MIC37100 Fixed Regulator Block Diagram 1.180V 1.240V Ref. 1.240V Ref. Thermal Shut- down MIC37102 Adjustable Regulator Block Diagram 10 OUT Thermal Shut- down ...

Page 11

... F or greater. For values of output capacitance lower than 10 F, the recommended ESR range is 200m The minimum value of output capacitance recommended for the MIC37100/ 01/02 is 4.7 F. For greater the ESR range recommended is less than 1 . Ultra-low ESR ceramic capacitors are recommended for output capacitance greater to help improve tran- sient response and noise reduction at high frequency ...

Page 12

... MIC37100/37101/37102 Minimum Load Current The MIC37100/01/02 regulator is specified between finite loads. If the output current is too small, leakage currents dominate and the output voltage rises. A 10mA minimum load current is necessary for proper regulation. Adjustable Regulator Design MIC37102 V IN OUT IN ENABLE EN ADJ SHUTDOWN ...

Page 13

... MIC37100/37101/37102 900 800 700 600 500 400 300 200 100 0 0 0.25 0.50 0.75 1.00 1.25 1.50 POWER DISSIPATION (W) Figure 4. Copper Area vs. Power SO-8 Power Dissipation Figure 4 shows copper area versus power dissipation with each trace corresponding to a different temperature rise above ambient. From these curves, the minimum area of copper necessary for the part to operate safely can be determined ...

Page 14

... MIC37100/37101/37102 Package Information 0.026 (0.65) 0.157 (3.99) 0.150 (3.81) 0.064 (1.63) 0.045 (1.14) M9999-091604 3.15 (0.124) 2.90 (0.114 3.71 (0.146) 7.49 (0.295 3.30 (0.130) 6.71 (0.264) 2.41 (0.095) 1.04 (0.041) 2.21 (0.087) 0.85 (0.033) 4.7 (0.185) 4.5 (0.177) 1.70 (0.067) 16 6.70 (0.264) 1.52 (0.060) 10 6.30 (0.248) 0.10 (0.004) 10 0.02 (0.0008) MAX 0.84 (0.033) 0.64 (0.025) SOT-223 (S) MAX) PIN 1 DIMENSIONS: INCHES (MM) 0.020 (0.51) 0.013 (0.33) 0.050 (1.27) TYP ...

Page 15

... MIC37100/37101/37102 0.050 (1.27) 0.030 (0.76) 0.320 (8.13) 0.310 (7.87) MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. ...

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