MIC23163/4

4MHz, 2A, 100% Duty Cycle Buck Regulator

with HyperLight Load

and Power Good

HyperLight Load is a registered trademark of Micrel, 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

June

29, 2013

Revision 2.0

General Description

The MIC23163/4 is a high-efficiency, 4MHz, 2A,

synchronous buck regulator with HyperLight Load

(HLL)

mode and maximum 100% duty cycle. HLL provides very-

high efficiency at light loads and ultra-fast transient

response which makes the MIC23163/4 perfectly suited for

supplying processor core voltages. An additional benefit of

this proprietary architecture is very low output ripple

voltage throughout the entire load range with the use of

small output capacitors. The tiny 2.0mm × 2.0mm DFN

package saves precious board space and requires only

three external components.

The MIC23163/4 is designed for use with a very small

0.47µH inductor and 10µF output capacitor that enables a

total solution size, less than 1mm height.

The MIC23163/4 has a very low quiescent current of 33µA

and achieves as high as 85% efficiency at 1mA. At higher

loads, the MIC23163/4 provides a constant switching

frequency around 4MHz while achieving peak efficiencies

up to 93%. The MIC23164 incorporates an active

discharge feature that switches an 180Ω FET to ground to

discharge the output when the part is disabled.

The MIC23163/4 is available in 10-pin 2.0mm × 2.0mm

DFN

package with an operating junction temperature

range from –40°C to +125°C.

Datasheets and support documentation are available on

Micrel’s web site at: www.micrel.com

Features

• Input voltage: 2.7V to 5.5V

• 100% duty cycle

• 2A output current

• Up to 93% peak efficiency

• 85% typical efficiency at 1mA

• Programmable soft-start with pre-bias start-up capability

• Power Good (PG) Indicator

• 4MHz PWM operation in continuous mode

• Ultra-fast transient response

• Low ripple output voltage

• Fully-integrated MOSFET switches

• 0.1µA shutdown current

• Thermal shutdown and current-limit protection

• 10-pin 2.0mm × 2.0mm Thin DFN

• –40°C to +125°C junction temperature range

• Disable pull down 180Ω (MIC23164 only)

Applications

• Cellular modems

• Mobile handsets

• Portable media/MP3 players

• Portable navigation devices (GPS)

• WiFi/WiMax/WiBro modules

• Digital cameras

• Wireless LAN cards

Typical Application

Micrel, Inc.

MIC23163/4

July 2

9, 2013 2

Revision 2.0

Ordering Information

Part Number

Marking

Code

Output

Voltage

Auto

Discharge

Junction Temperature Range Package

(1, 2)

MIC23163YMT QAQ ADJ No

–40°C to +125°C

10-Pin 2mm × 2mm Thin DFN

MIC23164YMT KQA ADJ Yes

–40°C to +125°C

10-Pin 2mm × 2mm Thin DFN

Note:

1. DFN is a GREEN, RoHS-compliant package. Mold compound is Halogen Free.

2. DFN ▲ = Pin 1 identifier.

Pin Configuration

2mm × 2mm DFN (MT)

Adjustable Output Voltage

(Top View)

Pin Description

Pin Number Pin Name Pin Function

1 SW

Switch (Output): Internal power MOSFET output switches. Disable pull down 180Ω

(MIC23164 only).

2 EN

Enable (Input): Logic high enables operation of the regulator. Logic low will shut down the

device. Do not leave floating.

3 FB Feedback: Connect a resistor divider from the output to ground to set the output voltage.

4 NC Not Internally Connected.

5 PG

Power Good: Open drain output for the power good indicator. Use a pull-up resistor from this pin

to a voltage source to detect a power good condition.

6 SS

Soft Start: Place a capacitor from this pin to ground to program the soft start time. Do not leave

floating, 100pF minimum C

is required.

7 AGND

Analog Ground: Connect to central ground point where all high-current paths meet (C

, C

OUT

PGND) for best operation.

8 AVIN Analog Input Voltage: Connect a capacitor to ground to decouple the noise.

9 PVIN Power Input Voltage: Connect a capacitor to PGND to decouple the noise.

10 PGND Power Ground.

EP ePad Exposed Pad. Connect to GND.

Micrel, Inc.

MIC23163/4

July 2

9, 2013 3

Revision 2.0

Absolute Maximum Ratings

(3)

Supply Voltage (V

AVIN

, V

PVIN

) ............................. −0.3V to 6V

Power Good Voltage (V

) ................................ −0.3V to 6V

Output Switch Voltage (V

) ............................. −0.3V to 6V

Enable Input Voltage (V

) .. ..............................−0.3V to V

Junction Temperature (T

) ....................................... +150°C

Storage Temperature Range (T

) ............. −65°C to +150°C

Lead Temperature (soldering, 10s) ............................ 260°C

ESD Rating

(5)

................................................. ESD Sensitive

Operating Ratings

(4)

Supply Voltage (V

AVIN

, V

PVIN

) ............................ 2.7V to 5.5V

Enable Input Voltage (V

) .. ……………………….0V to V

Feedback Voltage (V

) ...................................... 0.7V to V

Junction Temperature Range (T

) .. ….−40°C ≤ T

≤ +125°C

Thermal Resistance

2mm x 2mm Thin

DFN -10 (θ

) ......................... 90°C/W

2mm x 2mm Thin

DFN -10 (θ

) ......................... 45°C/W

Electrical Characteristics

(6)

= 25°C; V

= V

= 3.6V; L = 0.47µH; C

OUT

= 10µF unless otherwise specified. Bold values indicate –40°C ≤ T

≤ +125°C, unless

otherwise noted.

Parameter Condition Min. Typ. Max. Units

Supply Voltage Range

2.7

5.5

Undervoltage Lockout Threshold (Turn-On)

2.40

2.53

2.65

Undervoltage Lockout Hysteresis 75

Quiescent Current

OUT

= 0mA , V

SNS

> 1.2 × V

OUT

Nominal

µA

Shutdown Current V

= 0V; V

= 5.5V 0.1

µA

Output Voltage Accuracy

= 3.6V if V

OUTNOM

< 2.5V, I

LOAD

= 20mA

−

2.5

+2.5

= 4.5V if V

OUTNOM

≥ 2.5V, I

LOAD

= 20mA

Feedback Regulation Voltage

0.68

0.7

0.72

Current Limit V

SNS

= 0.9*V

OUTNOM

2.5

3.3 A

Output Voltage Line Regulation

= 3.6V to 5.5V if V

OUTNOM

< 2.5V, I

LOAD

= 20mA

0.3 %/V

= 4.5V to 5.5V if V

OUTNOM

≥ 2.5V, I

LOAD

= 20mA

Output Voltage Load Regulation

20mA < I

LOAD

< 500mA, V

= 3.6V if V

OUTNOM

< 2.5V

0.3

20mA < I

LOAD

< 500mA, V

= 5.0V if V

OUTNOM

≥ 2.5V

20mA < I

LOAD

< 1A, V

= 3.6V if V

OUTNOM

< 2.5V

0.3

20mA < I

LOAD

< 1A, V

= 5.0V if V

OUTNOM

≥ 2.5V

PWM Switch ON-Resistance

= 100mA PMOS

0.13

= −100mA NMOS

Switching Frequency I

OUT

= 120mA 4 MHz

Soft-Start Time V

OUT

= 90%, C

= 1nF 1000 µs

Soft-Start Current V

= 0V 2.2 µA

Power Good Threshold (Rising) % of V

NOM

85 90 95 %

Notes:

3. Exceeding the absolute maximum ratings may damage the device.

4. The device is not guaranteed to function outside its operating ratings.

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

6. Specification for packaged product only.

Part #	06035C102KAT2A
Description	CAP 0.001UF 50VDC X7R 10% SMD0603 - Tape and Reel Additional Information:
Category	CAPACITOR
Availability	In Stock
Qty	2766

Qty	Price
1 - 580	$0.26758
581 - 1,161	$0.21285
1,162 - 1,742	$0.20068
1,743 - 2,323	$0.18649
2,324 +	$0.16622

06035C102KAT2A

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