MIC5320-SOYMT - Micrel - Datasheet.Directory

MIC5320

High-Performance Dual 150mA

µCap ULDO™

ULDO is a trademark of Micrel, Inc.

MLF and MicroLeadFrame are registered trademarks of Amkor Technologies, Inc.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

General Description

The MIC5320 is a tiny Dual Ultra Low-Dropout

(ULDO™) linear regulator ideally suited for portable

electronics. It’s ideal for today’s most demanding

ultra-thin portable applications including mobile

phones, camera modules, imaging sensors for digital

still and video cameras, PDAs, portable media players

(PMP) and PC cameras. The MIC5320 integrates two

high-performance, 150mA ULDOs into a tiny 6-pin

1.6mm x 1.6mm leadless Thin MLF® package, which

provides exceptional thermal package characteristics.

The MIC5320 is a µCap design which enables

operation with very small ceramic output capacitors

for stability, thereby reducing required board space

and component cost. The combination of extremely

low-dropout voltage, fast transient response and

exceptional thermal package characteristics makes it

ideal for portable electronics.

The MIC5320 ULDO™ is available in fixed-output

voltages in the tiny 6-pin 1.6mm x 1.6mm leadless

Thin MLF® package which is only 2.56mm2 in area,

less than 30% the area of the SOT-23, TSOP and

MLF® 3x3 packages. It’s also available in the thin

SOT-23-6 lead package and the standard 6-pin

1.6mm x 1.6mm leadless package. Additional voltage

options are available. For more information, contact

Micrel marketing department.

Data sheets and supporting documentation can be

found on Micrel’s web site at: www.micrel.com.

Features

• 2.3V to 5.5V input voltage range

• Ultra-low dropout voltage ULDO™ 35mV @

150mA

• Tiny 6-pin 1.6mm x 1.6mm Thin MLF® leadless

package

• Low-cost TSOT-23-6 package

• Independent enable pins

• 150mA output current per LDO

• µCap stable with 1µF ceramic capacitor

• Low quiescent current – 85µA per output

• Fast turn-on time – 30µs

• Thermal-shutdown protection

• Current-limit protection

Applications

• Mobile phones

• PDAs

• GPS receivers

• Portable electronics

• Portable media players

• Digital still and video cameras

Typical Application

VIN

EN 2

VOUT 1

VOUT 2

GND

MIC5320-x.xYMT

1µF

EN 1

1µF

VOUT 2

VOUT 1

Typical Application Circuit

February 2011 M9999-021111-H

Micrel, Inc. MIC5320

February 2011 2 M9999-021111-H

Ordering Information

Part Number Manufacturing

Part Number Marking* VOUT1/VOUT2** Junction

Temp. Range Package

MIC5320-1.8/1.5YMT MIC5320-GFYMT AGF 1.8V/1.5V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-1.8/1.6YMT MIC5320-GWYMT AGW 1.8V/1.6V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-1.8/1.8YMT MIC5320-GGYMT AGG 1.8V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-2.4/1.5YMT MIC5320-H4FYMT H4F 2.4V/1.5V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-2.5/1.8YMT MIC5320-JGYMT AJG 2.5V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-2.5/2.5YMT MIC5320-JJYMT AJJ 2.5V/2.5V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-2.6/1.85YMT MIC5320-KDYMT AKD 2.6V/1.85 –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-2.6/1.8YMT MIC5320-KGYMT AKG 2.6V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-2.7/2.7YMT MIC5320-LLYMT ALL 2.7V/2.7V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-2.8/1.5YMT MIC5320-MFYMT AMF 2.8V/1.5V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-2.8/1.8YMT MIC5320-MGYMT AMG 2.8V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-2.8/2.6YMT MIC5320-MKYMT AMK 2.8V/2.6V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-2.8/2.8YMT MIC5320-MMYMT AMM 2.8V/2.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-2.85/1.85YMT MIC5320-NDYMT AND 2.85V/1.85V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-2.85/2.6YMT MIC5320-NKYMT ANK 2.85V/2.6V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-2.85/2.85YMT MIC5320-NNYMT ANN 2.85V/2.85V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-2.9/1.5YMT MIC5320-OFYMT AOF 2.9V/1.5V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-2.9/1.8YMT MIC5320-OGYMT AOG 2.9V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-2.9/2.9YMT MIC5320-OOYMT AOO 2.9V/2.9V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-3.0/1.8YMT MIC5320-PGYMT APG 3.0V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-3.0/2.5YMT MIC5320-PJYMT APJ 3.0V/2.5V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-3.0/2.6YMT MIC5320-PKYMT APK 3.0V/2.6V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-3.0/2.8YMT MIC5320-PMYMT APM 3.0V/2.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-3.0/2.85YMT MIC5320-PNYMT APN 3.0V/2.85V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-3.0/3.0YMT MIC5320-PPYMT APP 3.0V/3.0V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-3.3/1.5YMT MIC5320-SFYMT ASF 3.3V/1.5V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-3.3/1.8YMT MIC5320-SGYMT ASG 3.3V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-3.3/2.5YMT MIC5320-SJYMT ASJ 3.3V/2.5V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-3.3/2.6YMT MIC5320-SKYMT ASK 3.3V/2.6V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-3.3/2.7YMT MIC5320-SLYMT*** ASL 3.3V/2.7V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-3.3/2.8YMT MIC5320-SMYMT ASM 3.3V/2.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-3.3/2.85YMT MIC5320-SNYMT ASN 3.3V/2.85V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-3.3/2.9YMT MIC5320-SOYMT ASO 3.3V/2.9V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-3.3/3.0YMT MIC5320-SPYMT ASP 3.3V/3.0V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-3.3/3.2YMT MIC5320-SRYMT ASR 3.3V/3.2V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-3.3/3.3YMT MIC5320-SSYMT ASS 3.3V/3.3V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-4.6/2.8YMT MIC5320-46MYMT 46M 4.6V/2.8V –40°C to +125°C 6-Pin 1.6x1.6 Thin MLF®

MIC5320-2.5/1.8YML MIC5320-JGYML AJG 2.5V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 MLF®

MIC5320-2.5/2.5YML MIC5320-JJYML*** AJJ 2.5V/2.5V –40°C to +125°C 6-Pin 1.6x1.6 MLF®

MIC5320-2.6/1.8YML MIC5320-KGYML AKG 2.6V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 MLF®

MIC5320-2.7/2.7YML MIC5320-LLYML ALL 2.7V/2.7V –40°C to +125°C 6-Pin 1.6x1.6 MLF®

MIC5320-2.8/1.5YML MIC5320-MFYML AMF 2.8V/1.5V –40°C to +125°C 6-Pin 1.6x1.6 MLF®

MIC5320-2.8/1.8YML MIC5320-MGYML AMG 2.8V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 MLF®

MIC5320-2.8/2.8YML MIC5320-MMYML AMM 2.8V/2.8V –40°C to +125°C 6-Pin 1.6x1.6 MLF®

MIC5320-3.0/2.5YML MIC5320-PJYML APJ 3.0V/2.5V –40°C to +125°C 6-Pin 1.6x1.6 MLF®

MIC5320-3.0/2.6YML MIC5320-PKYML APK 3.0V/2.6V –40°C to +125°C 6-Pin 1.6x1.6 MLF®

Micrel, Inc. MIC5320

February 2011 3 M9999-021111-H

Part Number Manufacturing

Part Number Marking* VOUT1/VOUT2** Junction

Temp. Range Package

MIC5320-3.0/3.0YML MIC5320-PPYML APP 3.0V/3.0V –40°C to +125°C 6-Pin 1.6x1.6 MLF®

MIC5320-3.3/1.8YML MIC5320-SGYML ASG 3.3V/1.8V –40°C to +125°C 6-Pin 1.6x1.6 MLF®

MIC5320-3.3/2.5YML MIC5320-SJYML ASJ 3.3V/2.5V –40°C to +125°C 6-Pin 1.6x1.6 MLF®

MIC5320-3.3/2.7YML MIC5320-SLYML*** ASL 3.3V/2.7V –40°C to +125°C 6-Pin 1.6x1.6 MLF®

MIC5320-3.3/2.8YML MIC5320-SMYML ASM 3.3V/2.8V –40°C to +125°C 6-Pin 1.6x1.6 MLF®

MIC5320-1.8/1.5YD6 MIC5320-GFYD6 QAGF 1.8V/1.5V –40°C to +125°C 6-Pin TSOT-23

MIC5320-1.8/1.8YD6 MIC5320-GGYD6 QAGG 1.8V/1.8V –40°C to +125°C 6-Pin TSOT-23

MIC5320-1.8/1.6YD6 MIC5320-GWYD6*** QAGW 1.8V/1.6V –40°C to +125°C 6-Pin TSOT-23

MIC5320-2.4/1.5YD6 MIC5320-H4FYD6 QH4F 2.4V/1.5V –40°C to +125°C 6-Pin TSOT-23

MIC5320-2.5/1.8YD6 MIC5320-JGYD6 QAJG 2.5V/1.8V –40°C to +125°C 6-Pin TSOT-23

MIC5320-2.5/2.5YD6 MIC5320-JJYD6*** QAJJ 2.5V/2.5V –40°C to +125°C 6-Pin TSOT-23

MIC5320-2.6/1.85YD6 MIC5320-KDYD6*** QAKD 2.6V/1.85 –40°C to +125°C 6-Pin TSOT-23

MIC5320-2.6/1.8YD6 MIC5320-KGYD6 QAKG 2.6V/1.8V –40°C to +125°C 6-Pin TSOT-23

MIC5320-2.7/2.7YD6 MIC5320-LLYD6 QALL 2.7V/2.7V –40°C to +125°C 6-Pin TSOT-23

MIC5320-2.8/1.5YD6 MIC5320-MFYD6 QAMF 2.8V/1.5V –40°C to +125°C 6-Pin TSOT-23

MIC5320-2.8/1.8YD6 MIC5320-MGYD6 QAMG 2.8V/1.8V –40°C to +125°C 6-Pin TSOT-23

MIC5320-2.8/2.6YD6 MIC5320-MKYD6 QAMK 2.8V/2.6V –40°C to +125°C 6-Pin TSOT-23

MIC5320-2.8/2.8YD6 MIC5320-MMYD6 QAMM 2.8V/2.8V –40°C to +125°C 6-Pin TSOT-23

MIC5320-2.85/1.85YD6 MIC5320-NDYD6*** QAND 2.85V/1.85V –40°C to +125°C 6-Pin TSOT-23

MIC5320-2.85/2.6YD6 MIC5320-NKYD6*** QANK 2.85V/2.6V –40°C to +125°C 6-Pin TSOT-23

MIC5320-2.85/2.85YD6 MIC5320-NNYD6 QANN 2.85V/2.85V –40°C to +125°C 6-Pin TSOT-23

MIC5320-2.9/1.5YD6 MIC5320-OFYD6*** QAOF 2.9V/1.5V –40°C to +125°C 6-Pin TSOT-23

MIC5320-2.9/1.8YD6 MIC5320-OGYD6*** QAOG 2.9V/1.8V –40°C to +125°C 6-Pin TSOT-23

MIC5320-2.9/2.9YD6 MIC5320-OOYD6*** QAOO 2.9V/2.9V –40°C to +125°C 6-Pin TSOT-23

MIC5320-3.0/1.8YD6 MIC5320-PGYD6 QAPG 3.0V/1.8V –40°C to +125°C 6-Pin TSOT-23

MIC5320-3.0/2.5YD6 MIC5320-PJYD6*** QAPJ 3.0V/2.5V –40°C to +125°C 6-Pin TSOT-23

MIC5320-3.0/2.6YD6 MIC5320-PKYD6 QAPK 3.0V/2.6V –40°C to +125°C 6-Pin TSOT-23

MIC5320-3.0/2.8YD6 MIC5320-PMYD6*** QAPM 3.0V/2.8V –40°C to +125°C 6-Pin TSOT-23

MIC5320-3.0/2.85YD6 MIC5320-PNYD6*** QAPN 3.0V/2.85V –40°C to +125°C 6-Pin TSOT-23

MIC5320-3.0/3.0YD6 MIC5320-PPYD6 QAPP 3.0V/3.0V –40°C to +125°C 6-Pin TSOT-23

MIC5320-3.3/1.5YD6 MIC5320-SFYD6 QASF 3.3V/1.5V –40°C to +125°C 6-Pin TSOT-23

MIC5320-3.3/1.8YD6 MIC5320-SGYD6 QASG 3.3V/1.8V –40°C to +125°C 6-Pin TSOT-23

MIC5320-3.3/2.5YD6 MIC5320-SJYD6 QASJ 3.3V/2.5V –40°C to +125°C 6-Pin TSOT-23

MIC5320-3.3/2.6YD6 MIC5320-SKYD6*** QASK 3.3V/2.6V –40°C to +125°C 6-Pin TSOT-23

MIC5320-3.3/2.7YD6 MIC5320-SLYD6*** QASL 3.3V/2.7V –40°C to +125°C 6-Pin TSOT-23

MIC5320-3.3/2.8YD6 MIC5320-SMYD6*** QASM 3.3V/2.8V –40°C to +125°C 6-Pin TSOT-23

MIC5320-3.3/2.85YD6 MIC5320-SNYD6*** QASN 3.3V/2.85V –40°C to +125°C 6-Pin TSOT-23

MIC5320-3.3/2.9YD6 MIC5320-SOYD6*** QASO 3.3V/2.9V –40°C to +125°C 6-Pin TSOT-23

MIC5320-3.3/3.0YD6 MIC5320-SPYD6 QASP 3.3V/3.0V –40°C to +125°C 6-Pin TSOT-23

MIC5320-3.3/3.2YD6 MIC5320-SRYD6*** QASR 3.3V/3.2V –40°C to +125°C 6-Pin TSOT-23

MIC5320-3.3/3.3YD6 MIC5320-SSYD6 QASS 3.3V/3.3V –40°C to +125°C 6-Pin TSOT-23

Notes

MLF® is a GREEN RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.

* Under bar( _ )/Over bar ( ¯ ) symbol may not be to scale. Thin MLF (MT) package Pin 1 identified = ▲.

** For other voltages available. Contact Micrel for more details.

*** Contact Micrel Marketing for availability.

Micrel, Inc. MIC5320

February 2011 4 M9999-021111-H

Pin Configuration

1VIN

GND

EN2

6 VOUT1

VOUT2

EN1

VIN GND

VOUT1 EN1

EN2

VOUT2

6-Pin 1.6mm x 1.6mm Thin MLF (MT) / MLF (ML)

Top View

TSOT-23-6 (D6)

Top View

Pin Description

Pin Number

Thin MLF-6 /

MLF-6

Pin Number

TSOT-23-6

Pin Name

Pin Function

1 3 VIN Supply Input.

2 2 GND Ground

3 1 EN2

Enable Input (regulator 2). Active High Input. Logic High = On; Logic Low = Off;

Do not leave floating.

4 6 EN1

Enable Input (regulator 1). Active High Input. Logic High = On; Logic Low = Off;

Do not leave floating.

5 5 VOUT2 Regulator Output – LDO2

6 4 VOUT1 Regulator Output – LDO1

HS Pad – EPAD Exposed heatsink pad connected to ground internally.

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February 2011 5 M9999-021111-H

Absolute Maximum Ratings(1)

Supply Voltage (VIN).....................................0V to +6V

Enable Input Voltage (VEN)...........................0V to +6V

Power Dissipation………………… Internally Limited(3)

Lead Temperature (soldering, 3sec)..................260°C

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

ESD Rating(4) .........................................................2kV

Operating Ratings(2)

Supply Voltage (VIN).............................. +2.3V to +5.5V

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

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

Junction Thermal Resistance

Thin MLF-6 / MLF-6 (θJA) ........................ 100°C/W

TSOT-6 (θJA) ........................................... 235°C/W

Electrical Characteristics(5)

VIN = EN1 = EN2 = VOUT + 1.0V; higher of the two regulator outputs, IOUTLDO1 = IOUTLDO2 = 100µA; COUT1 = COUT2 = 1µF;

TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C, unless noted.

Parameter Conditions Min Typ Max Units

Variation from nominal VOUT -2.0 +2.0 % Output Voltage Accuracy

Variation from nominal VOUT; –40°C to +125°C -3.0 +3.0 %

Line Regulation VIN = VOUT + 1V to 5.5V; IOUT = 100µA 0.02 0.3

0.6

%/V

Load Regulation IOUT = 100µA to 150mA 0.5 2 %

Dropout Voltage (6) IOUT = 100µA

IOUT = 50mA

IOUT = 100mA

IOUT = 150mA

0.1

100

Ground Current EN1 = High; EN2 = Low; IOUT = 100µA to 150mA

EN1 = Low; EN2 = High; IOUT = 100µA to 150mA

EN1 = EN2 = High; IOUT1 = 150mA, IOUT2 = 150mA

150

120

190

µA

Ground Current in Shutdown EN1 = EN2 = 0V 0.01 2 µA

Ripple Rejection f = 1kHz; COUT = 1.0µF

f=20kHz; COUT = 1.0µF

Current Limit VOUT = 0V 300 550 950 mA

Output Voltage Noise COUT = 1.0µF; 10Hz to 100KHz 90 µVRMS

Enable Inputs (EN1 / EN2)

Logic Low 0.2 V Enable Input Voltage

Logic High 1.1 V

VIL ≤ 0.2V 0.01 1 µA Enable Input Current

VIH ≥ 1.0V 0.01 1 µA

Turn-on Time (See Timing Diagram)

Turn-on Time (LDO1 and 2) COUT = 1.0µF 30 100 µs

Notes:

1. Exceeding the absolute maximum rating may damage the device.

2. The device is not guaranteed to function outside its operating rating.

3. The maximum allowable power dissipation of any TA (ambient temperature) is PD(max) = TJ(max) – TA) / θJA. Exceeding the maximum allowable

power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.

4. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.

5. Specification for packaged product only.

6. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal VOUT. For outputs below 2.3V,

the dropout voltage is the input-to-output differential with the minimum input voltage 2.3V.

Micrel, Inc. MIC5320

February 2011 6 M9999-021111-H

Functional Diagram

EN 1

Enable

Reference

LDO1

EN 2

LDO2

VIN VOUT 1

VOUT 2

GND

MIC5320 Block Diagram

Micrel, Inc. MIC5320

February 2011 7 M9999-021111-H

Typical Characteristics

-10

-20

-30

-40

-50

-60

-70

-80

Power Supply

Rejection Ratio

FREQUENCY (kHz)

0.1 10 100 1,000

VIN = VOUT +1V

VOUT = 2.8V

COUT = 1µF

150mA

50mA

02 55 07 5 100 125 150

OUTPUT CURRENT (mA)

Dropout Voltage

vs. Output Current

VIN = VOUT + 1V

VOUT = 2.8V

COUT = 1µF

EN1 = VIN

2.50

2.55

2.60

2.65

2.70

2.85

2.90

2.95

3.00

Output Voltage

vs. Temperature

20 40 60 80

TEMPERATURE (°C)

2.75

2.80

VIN = VOUT + 1V

VOUT = 2.8V

COUT = 1µF

EN1 = VIN

100

70 20 40 60 80

TEMPERATURE (°C)

Ground Current

vs. Temperature

100µA

VIN = VOUT + 1V

VOUT = 2.8V

COUT = 1µF

EN1 = VIN

EN2 = GND

100

70 20 40 60 80

TEMPERATURE (°C)

Ground Current

vs. Temperature

150mA

VIN = VOUT + 1V

VOUT = 2.8V

COUT = 1µF

EN1 = VIN

EN2 = GND

0.0

0.5

1.0

1.5

2.0

2.5

3.0

0123456

INPUT VOLTAGE (V)

Output Voltage

vs. Input Voltage

2.8V

1.5V

2.5

IOUT = 100µA

COUT = 1µF

Dropout Voltage

vs. Temperature

20 40 60 80

TEMPERATURE (°C)

100µA

10mA

50mA

100mA

150mA

VIN = VOUT + 1V

VOUT = 2.8V

COUT = 1µF

2.70

2.75

2.80

2.85

2.90

02 5 50 75 100 125 150

OUTPUT CURRENT (mA)

Output Voltage

vs. Output Current

VIN = VOUT + 1V

VOUT = 2.8V

COUT1 = COUT2 = 1µF

EN1 = VIN

EN2 = GND

1.40

1.45

1.50

1.55

1.60

02 5 50 75 100 125 150

OUTPUT CURRENT (mA)

Output Voltage

vs. Output Current

VIN = VOUT + 1V

VOUT = 1.5V

COUT1 = COUT2 = 1µF

EN1 = GND

EN2 = VIN

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February 2011 8 M9999-021111-H

Typical Characteristics (Continued)

02 55 07 5 100 125 150

OUTPUT CURRENT (mA)

Ground Current

vs. Output Current

VIN = VOUT + 1V

VOUT = 2.85V

EN1 = VIN

COUT1 = 1µF

142

146

150

154

158

162

02 55 07 5 100 125 150

OUTPUT CURRENT (mA)

Ground Current

vs. Output Current

VIN = VOUT + 1V

VOUT = 2.85V

EN1 = EN2 = VIN

COUT1 = COUT2 = 1µF

510

520

530

540

550

560

570

580

590

600

610

3 3.5 4 4.5 5 5.5

INPUT VOLTAGE (V)

Current Limit

vs. Input Voltage

EN1 = VIN

COUT = 1µF

0.001

0.01

0.1

Output Noise

Spectral Density

FREQUENCY (kHz)

0.10.01 10 100 1,000

VIN = 4V

VOUT = 2.8V

COUT = 1µF

ILOAD = 50mA

Micrel, Inc. MIC5320

February 2011 9 M9999-021111-H

Functional Characteristics

Enable Turn-On

EN1

(1V/div)

VOUT1

(1V/div)

Time (10µs/div )

VIN = VOUT + 1V

VOUT = 2.8V

COUT = 1µF

Load Transient

Output Voltage

(20mV/div)

Output Current

(50mA/div)

Time (40µs/div )

VIN = VOUT + 1V

VOUT = 2.8V

COUT = 1µF

150mA

10mA

Line Transient

Input Voltag e

(2V/div)

Output Voltag e

(50mV/div)

Time (40µs/div )

VIN = VOUT + 1V

VOUT = 2.8V

COUT = 1µF

IOUT = 10mA

5.5V

Micrel, Inc. MIC5320

February 2011 10 M9999-021111-H

Applications Information

Thermal Considerations Enable/Shutdown

The MIC5320 is designed to provide 150mA of

continuous current for both outputs in a very small

package. Maximum ambient operating temperature

can be calculated based on the output current and the

voltage drop across the part. Given that the input

voltage is 3.3V, the output voltage is 2.8V for VOUT1,

1.5V for VOUT2 and the output current = 150mA. The

actual power dissipation of the regulator circuit can be

determined using the equation:

The MIC5320 comes with dual active-high enable pins

that allow each regulator to be disabled

independently. Forcing the enable pin low disables the

regulator and sends it into a “zero” off-mode-current

state. In this state, current consumed by the regulator

goes nearly to zero. Forcing the enable pin high

enables the output voltage. The active-high enable pin

uses CMOS technology and the enable pin cannot be

left floating; a floating enable pin may cause an

indeterminate state on the output.

PD = (VIN – VOUT1) IOUT1 + (VIN – VOUT2) IOUT2+

VIN IGND

Input Capacitor

The MIC5320 is a high-performance, high bandwidth

device. Therefore, it requires a well-bypassed input

supply for optimal performance. A 1µF capacitor is

required from the input to ground to provide stability.

Low-ESR ceramic capacitors provide optimal

performance at a minimum of space. Additional high-

frequency capacitors, such as small-valued NPO

dielectric-type capacitors, help filter out high-

frequency noise and are good practice in any RF-

based circuit.

Because this device is CMOS and the ground current

is typically <150µA over the load range, the power

dissipation contributed by the ground current is < 1%

and can be ignored for this calculation.

PD = (3.3V – 2.8V) × 150mA + (3.3V -1.5) ×

150mA

D = 0.345W

Output Capacitor

The MIC5320 requires an output capacitor of 1µF or

greater to maintain stability. The design is optimized

for use with low-ESR ceramic chip capacitors. High

ESR capacitors may cause high frequency oscillation.

The output capacitor can be increased, but

performance has been optimized for a 1µF ceramic

output capacitor and does not improve significantly

with larger capacitance.

To determine the maximum ambient operating

temperature of the package, use the junction-to-

ambient thermal resistance of the device and the

following basic equation:

PD(MAX) = TJ(MAX) - TA

⎝

⎛

X7R/X5R dielectric-type ceramic capacitors are

recommended because of their temperature

performance. X7R-type capacitors change

capacitance by 15% over their operating temperature

range and are the most stable type of ceramic

capacitors. Z5U and Y5V dielectric capacitors change

value by as much as 50% and 60%, respectively, over

their operating temperature ranges. To use a ceramic

chip capacitor with Y5V dielectric, the value must be

much higher than an X7R ceramic capacitor to ensure

the same minimum capacitance over the equivalent

operating temperature range.

TJ(max) = 125°C, the maximum junction temperature of

the die θJA thermal resistance = 100°C/W.

The table below shows junction-to-ambient thermal

resistance for the MIC5320 in different packages.

Package θJA Recommended

Minimum Footprint θJC

6-Pin 1.6x1.6 Thin MLF® 100°C/W 2°C/W

Thermal Resistance

No-Load Stability

Unlike many other voltage regulators, the MIC5320

will remain stable and in regulation with no load. This

is especially important in CMOS RAM keep-alive

applications.

Micrel, Inc. MIC5320

February 2011 11 M9999-021111-H

Substituting PD for PD(max) and solving for the ambient

operating temperature will give the maximum

operating conditions for the regulator circuit. The

junction-to-ambient thermal resistance for the

minimum footprint is 100°C/W.

The maximum power dissipation must not be

exceeded for proper operation.

For example, when operating the MIC5320-MFYMT at

an input voltage of 3.3V and 150mA loads at each

output with a minimum footprint layout, the maximum

ambient operating temperature TA can be determined

as follows:

0.345W = (125°C – TA)/(100°C/W)

A = 90.5°C

Therefore, a 2.8V/1.5V application with 150mA at

each output current can accept an ambient operating

temperature of 90.5°C in a 1.6mm x 1.6mm Thin

MLF® package. For a full discussion of heat sinking

and thermal effects on voltage regulators, refer to the

“Regulator Thermals” section of Micrel’s Designing

with Low-Dropout Voltage Regulators handbook. This

information can be found on Micrel's website at:

http://www.micrel.com/_PDF/other/LDOBk_ds.pdf

Micrel, Inc. MIC5320

February 2011 12 M9999-021111-H

Package Information

6-Pin 1.6mm x 1.6mm Thin MLF (MT)

6-Pin 1.6mm x 1.6mm MLF (ML)

Micrel, Inc. MIC5320

February 2011 13 M9999-021111-H

6-Pin TSOT-23 (D6)

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Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This

information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry,

specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual

property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no

liability whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or

warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right.

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