Datasheet MIC5210-3.6BMM, MIC5210-3.0BMM, MIC5210-5.0BMM, MIC5210-3.3BMM, MIC5210-4.0BMM Datasheet (MICREL)

MIC5210 Micrel

MIC5210

Dual 100mA LDO Regulator

Advance Information

General Description

The MIC5210 is a dual linear voltage regulator with very low
dropout voltage (typically 10mV at light loads and 140mV at
100mA), very low ground current (225µA at 10mA output), and
better than 3% initial accuracy. It also features individual
logic-compatible enable/shutdown control inputs.

Designed especially for hand-held battery powered devices,
the MIC5210 can be switched by a CMOS or TTL compatible
logic signal, or the enable pin can be connected to the supply
input for 3-terminal operation. When disabled, power con­sumption drops nearly to zero. Dropout ground current is
minimized to prolong battery life.

Key features include current limiting, overtemperature shut­down, and protection against reversed battery.

The MIC5210 is available in 3.0V, 3.3V, 3.6V, 4.0V and 5.0V
fixed voltage configurations. Other voltages are available;
contact Micrel for details.

Ordering Information

Features

• Micrel Mini 8™ MSOP package

• Guaranteed 100mA outputs

• Low quiescent current

• Low dropout voltage

• Wide selection of output voltages

• Tight load and line regulation

• Low temperature coefficient

• Current and thermal limiting

• Reversed input polarity protection

• Zero off-mode current

• Logic-controlled electronic enable

Applications

• Cellular telephones

• Laptop, notebook, and palmtop computers

• Battery powered equipment

• Bar code scanners

• SMPS post regulator/dc-to-dc modules

• High-efficiency linear power supplies

Typical Application

Output A

Output B

2.2µF

Part Number Voltage Accuracy Junction Temp. Range* Package

MIC5210-3.0BMM 3.0 1.0% –40°C to +125°C 8-lead MSOP
MIC5210-3.3BMM 3.3 1.0% –40°C to +125°C 8-lead MSOP
MIC5210-3.6BMM 3.6 1.0% –40°C to +125°C 8-lead MSOP
MIC5210-4.0BMM 4.0 1.0% –40°C to +125°C 8-lead MSOP
MIC5210-5.0BMM 5.0 1.0% –40°C to +125°C 8-lead MSOP

Other voltages available. Contact Micrel for details.

1µF

1
2
3
4

C

BYP

470µF

MIC5210

Enable may be connected to V

8

Enable A

7
6

Enable B

5

IN

1µF

Low-Noise + Ultralow-Noise (Dual) Regulator

MM8 and Micrel Mini 8 are trademarks of Micrel, Inc.

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

April 1997• 1 MIC5210

MIC5210 Micrel

Pin Configuration

OUTA

GND

OUTB

BYPB

Pin Description

Pin Number Pin Name Pin Function

1 OUTA Regulator Output A
2 GND Ground: Both pins must be connected together.
3 OUTB Regulator Output B
4 BYPB Reference Bypass B: Connect external 470pF capacitor to GND to reduce

5 ENB Enable/Shutdown B (Input): CMOS compatible input. Logic high = enable,

6 INB Supply Input B
7 ENA Enable/Shutdown A (Input): CMOS compatible input. Logic high = enable,

8 INA Supply Input A

1
2
3
4

8

INA

7

ENA

6

INB
ENB

5

MIC5210BMM

output noise in regulator “B”. May be left open.

logic low or open = shutdown. Do not leave floating.

logic low or open = shutdown. Do not leave floating.

Absolute Maximum Ratings

Supply Input Voltage (VIN) ............................ –20V to +20V

Enable Input Voltage (VEN) ........................... –20V to +20V

Power Dissipation (PD) ............................ Internally Limited

Storage Temperature Range ................... –60°C to +150°C

Recommended Operating Conditions

Supply Input Voltage (VIN) ............................... 2.5V to 16V

Enable Input Voltage (VEN) ................................. 0V to 16V

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

8-lead MSOP (θJA) ................................................... Note 1

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

MIC5210 2 April 1997•

MIC5210 Micrel

Electrical Characteristics

VIN = V

Symbol Parameter Conditions Min Typical Max Units

V

O

∆V

O

∆V

O/VO

∆V

O/VO

V

– V

IN

I

GND

I

GND

PSRR Ripple Rejection frequency = 100Hz, IL = 100µA 75 500 dB
I

LIMIT

∆VO/∆P
e

no

ENABLE Input

V

IL

V

IH

I

IL

I

IH

+ 1V; IL = 100µA; CL = 1.0µF; VEN ≥ 2.0V; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C; unless noted.

OUT

Output Voltage Accuracy variation from specified V

OUT

–1 1 %
–2 2 %

/∆T Output Voltage Note 2 40 ppm/°C

Temperature Coefficient
Line Regulation VIN = V

+ 1V to 16V 0.004 0.012 % / V

OUT

0.05 % / V

Load Regulation IL = 0.1mA to 150mA (Note 3) 0.02 0.2 %

0.5 %

O

Dropout Voltage, Note 4 IL = 100µA1050mV

70 mV

IL = 50mA 110 150 mV

230 mV

= 100mA 140 250 mV

I

L

300 mV

IL = 150mA 165 275 mV

350 mV

Quiescent Current VEN ≤ 0.4V (shutdown) 0.01 1 µA

VEN ≤ 0.18V (shutdown) 5 µA

Ground Pin Current, Note 5 VEN ≥ 2.0V, IL = 100µA 80 125 µA

150 µA

IL = 50mA 350 600 µA

800 µA

IL = 100mA 600 1000 µA

1500 µA

= 150mA 1300 1900 µA

I

L

Current Limit V

D

Thermal Regulation Note 6 0.05 %/W

= 0V 320 500 mA

OUT

Output Noise IL = 50mA, CL = 2.2µF, 260

2500 µA

nV Hz

470pF from BYP to GND

Enable Input Logic-Low Voltage regulator shutdown 0.4 V

0.18 V
Enable Input Logic-High Voltage regulator enabled 2.0 V
Enable Input Current VIL ≤ 0.4V 0.01 –1 µA

V

≤ 0.18V –2 µA

IL

VIH ≥ 2.0V 5 20 µA
VIH ≥ 2.0V 25 µA

Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when

Note 2: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
Note 3: Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load

Note 4: Dropout Voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V

Note 5: Ground pin current is the regulator quiescent current plus pass transistor base current. The total current drawn from the supply is the sum of

Note 6: 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

operating the device outside of its operating ratings. The maximum allowable power dissipation is a function of the maximum junction
temperature, T
dissipation at any ambient temperature is calculated using: P
will result in excessive die temperature, and the regulator will go into thermal shutdown. The θJA of the 8-lead MSOP (MM) is 200°C/W
mounted on a PC board (see “Thermal Considerations” section for further details).

range from 0.1mA to 150mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification.

differential.

the load current plus the ground pin current.

regulation effects. Specifications are for a 150mA load pulse at VIN = 16V for t = 10ms.

, the junction-to-ambient thermal resistance, θJA, and the ambient temperature, TA. The maximum allowable power

J(max)

D(max)

= (T

J(max)–TA

) θJA. Exceeding the maximum allowable power dissipation

April 1997• 3 MIC5210

MIC5210 Micrel

√

√

Typical Characteristics

Power Supply Ripple Rejection

vs. Voltage Drop

60

50

1mA

40

30

10mA

I

OUT

= 100mA

20

C

10

RIPPLE REJECTION (dB)

0

0 0.1 0.2 0.3 0.4

VOLTAGE DROP (V)

OUT

= 1µF

Power Supply

Rejection Ratio

0

VIN = 6V
V

-20

-40

-60

PSRR (dB)

-80

-100

= 5V

OUT

I

= 100mA

OUT

C

= 1µF

OUT

1E+11E+21E+31E+41E+51E+61E+7

10

1k

100

10k

FREQUENCY (Hz)

100k

1M

10M

Turn-On Time

vs. Bypass Capacitance

10000

1000

TIME (µs)

100

10

10 100 1000 10000

CAPACITANCE (pF)

Power Supply

Rejection Ratio

0

VIN = 6V
V

-20

-40

-60

PSRR (dB)

-80

-100

= 5V

OUT

I

= 10mA

OUT

C

= 1µF

OUT

1E+11E+21E+31E+41E+51E+61E+7

10

1k

100

10k

FREQUENCY (Hz)

100k

1M

10M

Dropout Voltage

vs. Output Current

320
280
240
200

+125°C

+25°C

160
120

80
40

DROPOUT VOLTAGE (mV)

0

0 40 80 120 160

OUTPUT CURRENT (mA)

–40°C

Power Supply

Rejection Ratio

0

-20

-40

-60

PSRR (dB)

-80

-100

1E+11E+21E+31E+41E+51E+61E+7

10

1k

100

FREQUENCY (Hz)

10k

I
C

OUT

OUT

100k

VIN = 6V
V

= 5V

OUT

= 1mA

= 1µF

1M

10M

Power Supply

Rejection Ratio

0

-20

-40

-60

PSRR (dB)

-80

-100

1E+11E+21E+31E+41E+51E+61E+7

10

1k

100

FREQUENCY (Hz)

10k

I
C

OUT

OUT

100k

VIN = 6V
V

= 5V

OUT

= 100µA

= 1µF

1M

10M

Hz)

NOISE (µV/

0.001

0.0001

Noise Performance

10

1

0.1

100mA

10mA

0.01
V

= 5V

OUT

C

= 10µF

OUT

electrolytic

1E+11E+21E+31E+41E+51E+6 1E+7

10

1k

100

FREQUENCY (Hz)

1mA

10k 100k1M10M

Hz)

NOISE (µV/

0.001

0.0001

Noise Performance

10

1

100mA

0.1

0.01

V

= 5V

OUT

C

= 10µF

OUT

electrolytic
C

= 100pF

BYP

1E+11E+21E+31E+41E+51E+6 1E+7

10

100

FREQUENCY (Hz)

1mA

10mA

1k

10k 100k1M10M

MIC5210 4 April 1997•

MIC5210 Micrel

Applications Information

Enable/Shutdown

Forcing EN (enable/shutdown) high (> 2V) enables the regu­lator. EN is compatible with CMOS logic gates.

If the enable/shutdown feature is not required, connect EN to
IN (supply input).

Input Capacitor

A 1µF capacitor should be placed from IN to GND if there is
more than 10 inches of wire between the input and the ac filter
capacitor or if a battery is used as the input.

Reference Bypass Capacitor

BYP (reference bypass) is connected to the internal voltage
reference. A 470pF capacitor (C
GND quiets this reference, providing a significant reduction in
output noise. C
using C

, output capacitors of 2.2µF or greater are gener-

BYP

reduces the regulator phase margin; when

BYP

ally required to maintain stability.
The start-up speed of the MIC5210 is inversely proportional to

the size of the reference bypass capacitor. Applications re­quiring a slow ramp-up of output voltage should consider
larger values of C
consider omitting C

. Likewise, if rapid turn-on is necessary,

BYP

.

BYP

If output noise is not a major concern, omit C
BYP open.

Output Capacitor

An output capacitor is required between OUT and GND to
prevent oscillation. The minimum size of the output capacitor
is dependent upon whether a reference bypass capacitor is
used. 1.0µF minimum is recommended when C
used (see Figure 2). 2.2µF minimum is recommended when
C

is 470µF (see Figure 1). Larger values improve the

BYP

regulator’s transient response. The output capacitor value
may be increased without limit.

The output capacitor should have an ESR (effective series
resistance) of about 5Ω or less and a resonant frequency

) connected from BYP to

BYP

and leave

BYP

BYP

is not

above 1MHz. Most tantalum or aluminum electrolytic capaci­tors are adequate; film types will work, but are more expen­sive. Since many aluminum electrolytics have electrolytes
that freeze at about –30°C, solid tantalums are recommended
for operation below –25°C.

At lower values of output current, less output capacitance is
required for output stability. The capacitor can be reduced to

0.47µF for current below 10mA or 0.33µF for currents below
1mA.

No-Load Stability

The MIC5210 will remain stable and in regulation with no load
(other than the internal voltage divider) unlike many other
voltage regulators. This is especially important in CMOS RAM
keep-alive applications.

Dual-Supply Operation

When used in dual supply systems where the regulator load
is returned to a negative supply, the output voltage must be
diode clamped to ground.

Thermal Considerations

Multilayer boards having a ground plane, wide traces near the
pads, and large supply bus lines provide better thermal
conductivity.

The MIC5210-xxBMM (8-lead MSOP) has a thermal resis­tance of 200°C/W when mounted on a FR4 board with
minimum trace widths and no ground plane.

PC Board θ
Dielectric

FR4 200°C

JA

MSOP Thermal Characteristics

For additional heat sink characteristics, please refer to Micrel
Application Hint 17, “Calculating P.C. Board Heat Sink Area
For Surface Mount Packages”.

April 1997• 5 MIC5210

MIC5210 Micrel

Package Information

0.122 (3.10)

0.112 (2.84)

0.036 (0.90)

0.032 (0.81)

0.012 (0.03)

0.0256 (0.65) TYP

0.199 (5.05)

0.187 (4.74)

0.120 (3.05)

0.116 (2.95)

0.043 (1.09)

0.038 (0.97)

0.012 (0.30) R

0.008 (0.20)

0.004 (0.10)

8-Lead MSOP (MM)

MM8™ Micrel Mini 8™

5° MAX
0° MIN

DIMENSIONS:

INCH (MM)

0.007 (0.18)

0.005 (0.13)

0.012 (0.03) R

0.039 (0.99)

0.035 (0.89)

0.021 (0.53)

MIC5210 6 April 1997•

MIC5210 Micrel

April 1997• 7 MIC5210

MIC5210 Micrel

MICREL INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131 USA

TEL + 1 [phone] FAX + 1 [phone] WEB http://www.micrel.com

This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or

other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc.

© 1997 Micrel Incorporated

MIC5210 8 April 1997•