MICREL MIC39101-1.8BM, MIC39101-2.5BM, MIC39101-3.3BM, MIC39101-5.0BM, MIC39100-5.0BS Datasheet

MIC39100/39101/39102 Micrel

MIC39100/39101/39102

1A Low-Voltage Low-Dropout Regulator

General Description

The MIC39100, MIC39101, and MIC39102 are 1A low­dropout linear voltage regulators that provide low-voltage,
high-current output from an extremely small package. Utiliz­ing Micrel’s proprietary Super βeta PNP™ pass element, the
MIC39100/1/2 offers extremely low dropout (typically 410mV
at 1A) and low ground current (typically 11mA at 1A).

The MIC39100 is a fixed output regulator offered in the
SOT-223 package. The MIC39101 and MIC39102 are fixed
and adjustable regulators, respectively, in a thermally en­hanced power 8-lead SOP (small outline package).

The MIC39100/1/2 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. A guaranteed maximum dropout voltage of 630mV over
all operating conditions allows the MIC39100/1/2 to provide

2.5V from a supply as low as 3.13V and 1.8V from a supply
as low as 2.43V.

The MIC39100/1/2 is fully protected with overcurrent limiting,
thermal shutdown, and reversed-battery protection. Fixed
voltages of 5.0V, 3.3V, 2.5V, and 1.8V are available on
MIC39100/1 with adjustable output voltages to 1.24V on
MIC39102.

For other voltages, contact Micrel.

Features

• Fixed and adjustable output voltages to 1.24V

• 410mV typical dropout at 1A

Ideal for 3.0V to 2.5V conversion
Ideal for 2.5V to 1.8V conversion

• 1A minimum guaranteed output current

• 1% initial accuracy

• Low ground current

• Current limiting and thermal shutdown

• Reversed-battery protection

• Reversed-leakage protection

• Fast transient response

• Low-profile SOT-223 package

• Power SO-8 package

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

Typical Applications

V

3.3V

IN

MIC39100

IN 2.5V

OUT

GND

2.5V/1A Regulator

10µF
tantalum

Ordering Information

Part Number Voltage Junction Temp. Range Package

MIC39100-1.8BS 1.8V –40°C to +125°C SOT-223
MIC39100-2.5BS 2.5V –40°C to +125°C SOT-223
MIC39100-3.3BS 3.3V –40°C to +125°C SOT-223
MIC39100-5.0BS 5.0V –40°C to +125°C SOT-223
MIC39101-1.8BM 1.8V –40°C to +125°C SOP-8
MIC39101-2.5BM 2.5V –40°C to +125°C SOP-8
MIC39101-3.3BM 3.3V –40°C to +125°C SOP-8
MIC39101-5.0BM 5.0V –40°C to +125°C SOP-8
MIC39102BM Adj. –40°C to +125°C SOP-8

100k

V

IN

3.3V

ENABLE

SHUTDOWN

2.5V/1A Regulator with Error Flag

MIC39101

IN

EN

GND

OUT

R1

FLG

Error
Flag
Output

2.5V

10µF
tantalum

MIC39102

IN

EN

GND

OUT

ADJ

ENABLE

SHUTDOWN

V

2.5V

IN

1.5V/1A Adjustable Regulator

R1

R2

1.5V

10µF
tantalum

Super βeta PNP is a trademark of Micrel, Inc.

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 [phone] • fax + 1 [phone] • http://www.micrel.com

June 2000 1 MIC39100/39101/39102

MIC39100/39101/39102 Micrel

Pin Configuration

GND

TAB

132

IN OUTGND

MIC39100-x.x

Fixed

SOT-223 (S)

IN

OUT

FLG

1EN
2
3
4

MIC39101-x.x

Fixed

SOP-8 (M)

8 GND

GND

7

GND

6

GND

5

IN

OUT

ADJ

1EN
2
3
4

MIC39102

Adjustable

SOP-8 (M)

8 GND

GND

7

GND

6

GND

5

Pin Description

Pin No. Pin No. Pin No. Pin Name Pin Function

MIC39100 MIC39101 MIC39102

1 1 1 EN Enable (Input): CMOS-compatible control input. Logic high = enable, logic

low or open = shutdown.

2 2 IN Supply (Input)

3 3 3 OUT Regulator Output

4 FLG Flag (Output): Open-collector error flag output. Active low = output under-

voltage.

4 ADJ Adjustment Input: Feedback input. Connect to resitive voltage-divider

network.

2, TAB 5–85–8 GND Ground

MIC39100/39101/39102 2 June 2000

MIC39100/39101/39102 Micrel

Absolute Maximum Ratings (Note 1)

Supply Voltage (V
Enable Voltage (V
Storage Temperature (T

Lead Temperature (soldering, 5 sec.) ....................... 260°C

ESD, Note 3

) ..................................... –20V to +20V

IN

) ..................................................+20V

EN

) ....................... –65°C to +150°C

S

Operating Ratings (Note 2)

Supply Voltage (V
Enable Voltage (V
Maximum Power Dissipation (P

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

Package Thermal Resistance

) .................................. +2.25V to +16V

IN

) ..................................................+16V

EN

)..................... Note 4

D(max)

SOT-223 (θJC).....................................................15°C/W

SOP-8 (θJC).........................................................20°C/W

Electrical Characteristics

VIN = V

Symbol Parameter Condition Min Typ Max Units

V

OUT

∆V

OUT

V

DO

I

GND

I

OUT(lim)

Enable Input

V

EN

I

EN

Flag Output

I

FLG(leak)

V

FLG(do)

V

FLG

+ 1V; VEN = 2.25V; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C; unless noted

OUT

Output Voltage 10mA –11%

10mA ≤ I

Line Regulation I

= 10mA, V

OUT

Load Regulation VIN = V

≤ 1A, V

OUT

OUT

+ 1V, 10mA ≤ I

OUT

+ 1V ≤ VIN ≤ 8V –22%

OUT

+ 1V ≤ VIN ≤ 16V 0.06 0.5 %

≤ 1A, 0.2 1 %

OUT

/∆T Output Voltage Temp. Coefficient, 40 100 ppm/°C

Note 5

Dropout Voltage, Note 6 I

= 100mA, ∆V

OUT

= –1% 140 200 mV

OUT

250 mV

I

Ground Current, Note 7 I

Current Limit V

= 500mA, ∆V

OUT

I

= 750mA, ∆V

OUT

= 1A, ∆V

I

OUT

= 100mA, VIN = V

OUT

I

= 500mA, VIN = V

OUT

I

= 750mA, VIN = V

OUT

I

= 1A, VIN = V

OUT

= 0V, VIN = V

OUT

OUT

= –1% 275 mV

OUT

= –1% 330 500 mV

OUT

= –1% 550 mV

410 630 mV

+ 1V 400 µA

OUT

+ 1V 4 mA

OUT

+ 1V 6.5 mA

OUT

+ 1V 11 20 mA

OUT

+ 1V 1.8 2.5 A

OUT

Enable Input Voltage logic low (off) 0.8 V

logic high (on) 2.25 V

Enable Input Current VEN = 2.25V 1 15 30 µA

75 µA

V

= 0.8V 2 µA

EN

4 µA

Output Leakage Current VOH = 16V 0.01 1 µA

2 µA

Output Low Voltage VIN = 2.250V, IOL, = 250µA, Note 9 210 300 mV

400 mV
Low Threshold % of V
High Threshold % of V

OUT
OUT

93 %

99.2 %

Hysteresis 1%

June 2000 3 MIC39100/39101/39102

MIC39100/39101/39102 Micrel

Symbol Parameter Condition Min Typ Max Units
MIC39102 Only

Reference Voltage 1.228 1.240 1.252 V

1.215 1.265 V

Note 10 1.203 1.277 V

Adjust Pin Bias Current 40 80 nA

120 nA

Reference Voltage Note 7 20 ppm/°C
Temp. Coefficient

Adjust Pin Bias Current 0.1 nA/°C
Temp. Coefficient

Note 1. Exceeding the absolute maximum ratings may damage the device.
Note 2. The device is not guaranteed to function outside its operating rating.
Note 3. Devices are ESD sensitive. Handling precautions recommended.
Note 4. P
Note 5. Output voltage temperature coefficient is ∆V
Note 6. VDO = VIN – V

Note 7. I
Note 8. VEN ≤ 0.8V, VIN ≤ 8V, and V
Note 9. For a 2.5V device, VIN = 2.250V (device is in dropout).
Note 10. V
Note 11. Thermal regulation is defined as the change in output voltage at a time t after a change in power dissipation is applied, excluding load or line

= (T

D(max)

voltage is the input-to-output voltage differential with the minimum input voltage being 2.25V. Minimum input operating voltage is 2.25V.

is the quiescent current. IIN = I

GND

≤ V

REF

OUT

– TA) ÷ θJA, where θJA depends upon the printed circuit layout. See “Applications Information.”

J(max)

OUT

when V

decreases to 98% of its nominal output voltage with VIN = V

OUT

= 0V.

OUT

≤ (VIN – 1V), 2.25V ≤ V

OUT(worst case)

+ I

GND

IN

.

OUT

≤ 16V, 10mA ≤ IL ≤ 1A, TJ = T

÷ (T

J(max)

– T

MAX

J(min)

.

) where T

is +125°C and T

J(max)

+ 1V. For output voltages below 2.25V, dropout

OUT

J(min)

is –40°C.

regulation effects. Specifications are for a 200mA load pulse at VIN = 16V for t = 10ms.

MIC39100/39101/39102 4 June 2000