MIC94310-NYMT-TR [MICROCHIP]

Fixed Positive LDO Regulator;


型号：	MIC94310-NYMT-TR
厂家：	MICROCHIP
描述：	Fixed Positive LDO Regulator 光电二极管输出元件调节器
文件：	总15页 (文件大小：932K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

MIC94310

200mA LDO with

Ripple Blocker™ Technology

General Description

Features

The MIC94310 Ripple Blocker™ is a monolithic integrated

circuit that provides low-frequency ripple attenuation

(switching noise rejection) to a regulated output voltage.

This is important for applications where a DC/DC switching

converter is required to lower or raise a battery voltage but

where switching noise cannot be tolerated by sensitive

downstream circuits such as in RF applications. The

MIC94310 maintains high power supply ripple rejection

(PSRR) with input voltages operating near the output

voltage level to improve overall system efficiency. A low-

voltage logic enable pin facilitates ON/OFF control at

typical GPIO voltage levels.

• 1.8V to 3.6V input voltage range

• Active noise rejection over a wide frequency band

− >50dB from 10Hz to 10MHz at 200mA load

• Rated to 200mA output current

• Fixed output voltages

• Current-limit and thermal-limit protected

• Ultra-small 0.88mm × 0.88mm 4-ball WLCSP

• 1.2mm × 1.6mm 4-pin Thin DFN

• 5-pin SOT-23

• Logic-controlled enable pin

− −40°C to +125°C junction temperature range

The MIC94310 operates from an input voltage of 1.8V to

3.6V.

Applications

Packaged in a 0.88mm × 0.88mm 4-ball WLCSP, a 4-pin

1.2mm × 1.6mm Thin DFN, or a 5-pin SOT-23, the

MIC94310 has a junction operating temperature range of

–40°C to +125°C.

• Smartphones/Smart books

• Tablet PC/notebooks and webcams

• Digital still and video cameras

• Global positioning systems

• Mobile computing

Datasheets and support documentation are available on

Micrel’s web site at: www.micrel.com.

• Automotive and industrial applications

Typical Application

PSRR C_OUT= 1µF

-20

-40

-60

I_OUT= 200mA

I_OUT= 100mA

-80

-100

V_IN= 2.5V + 40mVpp

_OUT= 1.8V

I_OUT= 10mA

-120

100

10K

100K

10M

1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

FREQUENCY (Hz)

Ripple Blocker is a 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

September 11, 2014 Revision 2.1

Micrel, Inc.

MIC94310

Ordering Information

Part Number

Marking Code

Output Voltage

1.2V

Package^{(1, 2)}

Lead Finish

MIC94310-4YCS

MIC94310-FYCS

MIC94310-GYCS

MIC94310-DYCS

MIC94310-JYCS

MIC94310-LYCS

MIC94310-MYCS

MIC94310-NYCS

MIC94310-PYCS

MIC94310-SYCS

MIC94310-4YMT

MIC94310-FYMT

MIC94310-GYMT

MIC94310-DYMT

MIC94310-JYMT

MIC94310-LYMT

MIC94310-MYMT

MIC94310-NYMT

MIC94310-PYMT

MIC94310-SYMT

MIC94310-4YM5

MIC94310-GYM5

MIC94310-MYM5

MIC94310-SYM5

0.88mm × 0.88mm WLCSP

1.2mm × 1.6mm Thin DFN

5-Pin SOT-23

Pb-Free

1.5V

1.8V

1.85V

2.5V

2.7V

2.8V

2.85V

3.0V

3.3V

31T

32T

31G

31D

31J

31L

31M

31N

31P

31S

V31

W31

Z31

X31

1.2V

1.5V

1.8V

1.85V

2.5V

2.7V

2.8V

2.85V

3.0V

3.3V

1.2V

1.8V

5-Pin SOT-23

2.8V

5-Pin SOT-23

3.3V

5-Pin SOT-23

Note:

1. Thin DFN ▲ = Pin 1 identifier.

2. Thin DFN is a GREEN RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.

September 11, 2014

Revision 2.1

Micrel, Inc.

MIC94310

Pin Configuration

0.88mm × 0.88mm 4-Ball CSP (CS)

1.2mm × 1.6mm 4-Pin TDFN (MT)

Top View

5-Pin SOT-23 (M5)

Top View

Pin Description

Pin Number

(TDFN)

Pin Number

(SOT-23)

Ball Number

(WLCSP)

Pin Name Pin Function

VOUT

GND

Power switch output.

Ground.

Enable Input. A logic HIGH signal on this pin enables the part.

Logic LOW disables the part. Do not leave floating.

–

VIN

Power switch input and chip supply.

No Connect. Not internally connected.

Exposed Heatsink Pad. Connect to ground for best thermal

performance.

–

ePad

September 11, 2014

Revision 2.1

Micrel, Inc.

MIC94310

Functional Diagram

September 11, 2014

Revision 2.1

Micrel, Inc.

MIC94310

Absolute Maximum Ratings⁽³⁾

Operating Ratings⁽⁴⁾

Input Voltage (V_IN)...........................................–0.3 to +4.0V

Output Voltage (V_OUT) .................–0.3 to V_IN+0.3V or +4.0V

Enable Voltage (V_EN)...................–0.3 to V_IN+0.3V or +4.0V

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

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

ESD Rating⁽⁵⁾..................................................................3kV

Supply Voltage (V_IN)..................................... +1.8V to +3.6V

Enable Voltage (V_EN).............................................. 0V to V_IN

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

Junction Thermal Resistance

TDFN (θ_JA) .......................................................173°C/W

WLCSP (θ_JA)....................................................250°C/W

SOT-23 (θ_JA) ....................................................120°C/W

Electrical Characteristics⁽⁶⁾

V_IN= V_EN= V_OUT+ 500mV (V_IN= V_EN= 3.6V for V_OUT≥ 3.1V); I_OUT= 1mA; C_OUT= 1µF (YCS, YMT), C_OUT= 10µF (YM5); T_A= 25°C,

bold values indicate –40°C≤ T_J≤ +125°C, unless noted.

Parameter

Condition

Min.

1.8

–3

Typ.

Max.

3.6

Units

Input Voltage

Output Voltage Accuracy

Variation from nominal V_OUT

V_INto V_OUTdropout at 100mA output current

V_INto V_OUTdropout at 200mA output current

1mA to 100mA

±1

Dropout Voltage

100

Load Regulation

Line Regulation

Ground Current

Shutdown Current

0.5

250

V_IN= V_OUT+ 500mV to 3.6V

No load to full load

0.01

170

0.2

µA

V_EN= 0V

µA

f = 100Hz, I_OUT= 100mA

f = 100kHz, I_OUT= 100mA

f = 1MHz, I_OUT= 100mA

f = 10MHz, I_OUT= 100mA

V_OUT= 0V

V_INRipple Rejection

250

1.0

Current Limit

Total Output Noise

Turn-on Time

Enable

400

700

μV_RMS

μs

10Hz to 100kHz

0.4

Input Logic Level

Input Logic High

Input Current

Notes:

0.01

µA

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.

September 11, 2014

Revision 2.1

Micrel, Inc.

MIC94310

Typical Characteristics

PSRR C_OUT= 0.47µF

PSRR C_OUT= 1µF

PSRR C_OUT= 0.47µF

-20

V_IN= 2.0V

V_IN= 2.5V

I_OUT= 100mA

I_OUT= 200mA

-40

-60

-40

I_OUT= 200mA

I_OUT= 100mA

-60

V_IN= 3.6V

-80

-100

V_IN= V_IN(NOM)+ 40mVpp

LOAD = 100mA

V_OUT= 1.8V

-100

V_IN= 2.5V + 40mVpp

V_OUT= 1.8V

V_IN= 2.5V + 40mVpp

V_OUT= 1.8V

I_OUT= 10mA

-120

1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

10 100 1K 10K 100K 1M 10M

1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

10 100 1K 10K 100K 1M 10M

1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

10 100 1K 10K 100K 1M 10M

FREQUENCY (Hz)

PSRR C_OUT= 1µF

PSRR C_OUT= 2.2µF

-20

V_IN= V_IN(NOM)+ 40mVpp

LOAD = 100mA

V_OUT= 1.8V

V_IN= V_IN(NOM)+ 40mVpp

LOAD = 100mA

V_OUT= 1.8V

V_IN= 2.0V

V_IN= 2.5V

I_OUT= 200mA

I_OUT= 100mA

-40

V_IN= 2.5V

-60

-80

V_IN= 3.6V

V_IN= 2.5V + 40mVpp

V_OUT= 1.8V

-100

-120

-100

-120

-100

-120

I_OUT= 10mA

1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

10 100 1K 10K 100K 1M 10M

1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

10 100 1K 10K 100K 1M 10M

100

10K

100K

10M

FREQUENCY (Hz)

PSRR C_OUT= 4.7µF

PSRR C_OUT= 10µF

-20

V_IN= 2.0V

I_OUT= 200mA

I_OUT= 100mA

V_IN= 2.5V

-40

I_OUT= 200mA

I_OUT= 100mA

-60

-80

V_IN= 3.6V

V_IN= V_IN(NOM)+ 40mVpp

LOAD = 100mA

V_OUT= 1.8V

-100

-120

-100

-120

V_IN= 2.5V + 40mVpp

V_OUT= 1.8V

V_IN= 2.5V + 40mVpp

V_OUT= 1.8V

I_OUT= 10mA

-120

1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

10 100 1K 10K 100K 1M 10M

1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

10 100 1K 10K 100K 1M 10M

1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

10 100 1K 10K 100K 1M 10M

FREQUENCY (Hz)

September 11, 2014

Revision 2.1

Micrel, Inc.

MIC94310

Typical Characteristics (Continued)

PSRR C_OUT= 10µF

PSRR (Varying C_OUT)

PSRR (Varying C_OUT

)

-20

V_IN= V_IN(NOM)+ 40mVpp

LOAD = 100mA

V_OUT= 1.8V

C_OUT= 0.47µF

C_OUT= 1µF

C_OUT= 2.2µF

C_OUT= 10µF

V_IN= 2.0V

-40

V_IN= 2.5V

-60

-80

C_OUT= 4.7µF

C_OUT= 2.2µF

V_IN= 3.6V

V_IN= 2.5V + 40mVpp

LOAD = 100mA

V_OUT= 1.8V

V_IN= 2.5V + 40mVpp

LOAD = 100mA

V_OUT= 1.8V

-100

-120

100

10K

100K

10M

1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

10 100 1K 10K 100K 1M 10M

1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06 1.E+07

10 100 1K 10K 100K 1M 10M

FREQUENCY (Hz)

Dropout Voltage

vs. Output Current

Output Voltage

vs. Output Current

Output Voltage

vs. Input Voltage

2.00

1.900

1.875

1.850

1.825

1.800

1.775

1.750

1.725

1.700

1.95

1.90

1.85

1.80

1.75

I_OUT= 200mA

1.70

V_IN= 3.6V

1.65

1.60

C_IN= C_OUT= 1µF

100 125 150 175 200

20 40 60 80 100 120 140 160 180 200

2.2

2.4

2.6

2.8

3.2

3.4

3.6

OUTPUT CURRENT (mA)

INPUT VOLTAGE (V)

Output Noise Spectral Density

Ground Current

vs. Output Current

Ground Current

vs. Input Voltage

10.00

1.00

0.10

0.01

175

170

165

160

155

150

190

180

170

160

150

140

130

120

I_OUT= 200mA

I_OUT= 100mA

V_IN= V_EN= 3.1V

_IN= C_OUT= 1µF

_OUT= 1.8V

C_IN= C_OUT=1µF

NOISE (10Hz to 100kHz)

= 82.55µV_RMS

V_IN=2.8V

C_IN= C_OUT=1µF

100

10k

100k

1.E+01 1.E+02 1.E+03 1.E+04 1.E+05 1.E+06

20 40 60 80 100 120 140 160 180 200

2.2

2.4

2.6

2.8

3.2

3.4

3.6

FREQUENCY (Hz)

OUTPUT CURRENT (mA)

INPUT VOLTAGE (V)

September 11, 2014

Revision 2.1

Micrel, Inc.

MIC94310

Functional Characteristics

September 11, 2014

Revision 2.1

Micrel, Inc.

MIC94310

Application Information

The MIC94310 is a very-high PSRR, fixed-output, 200mA

LDO utilizing Ripple Blocker technology. The MIC94310

is fully protected from damage due to fault conditions,

offering linear current limiting and thermal shutdown.

Enable/Shutdown

Forcing the enable (EN) pin low disables the MIC94310

and sends it into a “zero” off mode current state. In this

state, current consumed by the MIC94310 goes nearly to

zero. Forcing EN high enables the output voltage. The

EN pin uses CMOS technology and cannot be left floating

as it could cause an indeterminate state on the output.

Input Capacitor

The MIC94310 is a high-performance, high-bandwidth

device. An input capacitor of 0.47µF 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. X5R or X7R dielectrics are

recommended for the input capacitor. Y5V dielectrics

lose most of their capacitance over temperature and are

therefore, not recommended.

Thermal Considerations

The MIC94310 is designed to provide 200mA of

continuous current in a very-small package. Maximum

ambient operating temperature can be calculated based

on the output current and the voltage drop across the

part. For example if the input voltage is 2.5V, the output

voltage is 1.8V, and the output current = 200mA. The

actual power dissipation of the Ripple Blocker™ can be

determined using Equation 1:

Output Capacitance

In order to maintain stability, the MIC94310 requires an

output capacitor of 0.47µF or greater for the Thin DFN

and WLCSP packages and 10µF or greater for the SOT-

23 package. For optimal ripple rejection performance a

1µF capacitor is recommended for the CSP and Thin

DFN packages, while a 10µF capacitor is recommended

for the SOT-23 package. The design is optimized for use

with low-ESR ceramic chip capacitors. High-ESR

capacitors are not recommended because they 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.

P_D= (V_IN– V_OUT1) I_OUT+ V_INI_GND

Eq. 1

Because this device is CMOS and the ground current is

typically <170µA over the load range, the power

dissipation contributed by the ground current is <1% and

can be ignored for this calculation.

P_D= (2.5V – 1.8V) × 200mA

P_D= 0.14W

X7R/X5R dielectric type ceramic capacitors are

recommended

because

their

temperature

To determine the maximum ambient operating

temperature of the package, use the junction-to-ambient

thermal resistance of the device and the Equation 2:

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 their value by as much as

50% and 60%, respectively, over their operating

temperature ranges. To use a ceramic chip capacitor with

the 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.

T_J(max)− T_A













P_D(MAX)

Eq. 2

θ_JA

T_J(MAX)= 125ºC, the maximum junction temperature of the

die, θ_JAthermal resistance = 173°C/W for the Thin DFN

package.

No Load Stability

The MIC94310 will remain stable and in regulation with

no load. This is especially important in CMOS RAM keep-

alive applications.

Substituting P_Dfor P_D(MAX)and solving for the ambient

operating temperature will give the maximum operating

conditions for the regulator circuit.

September 11, 2014

Revision 2.1

Micrel, Inc.

MIC94310

For proper operation, the maximum power dissipation

must not be exceeded.

For example, when operating the MIC94310-GYMT at an

input voltage of 2.5V and 200mA load with a minimum

footprint layout, the maximum ambient operating

temperature (T_A) can be determined as follows:

0.14W = (125ºC – T_A)/(173ºC/W)

T_A= 101ºC

Therefore, the maximum ambient operating temperature

allowed in a 1.2mm × 1.6mm Thin DFN package is

101ºC. 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

For more information about Micrel’s Ripple Blocker

products, please visit:

http://www.micrel.com/index.php/en/products/power-

management-ics/ldos/linear-power-filters.html

http://www.micrel.com/index.php/en/products/power-

management-ics/ldos/linear-power-filters/article/1-

mic94300.html

http://www.micrel.com/index.php/en/products/power-

management-ics/ldos/linear-power-filters/article/3-

mic94310.html

September 11, 2014

Revision 2.1

Micrel, Inc.

MIC94310

Evaluation Board Schematic

Bill of Materials

Item

C1, C2

Part Number

Manufacturer Description

Qty.

GRM155R61A105KE15D

MIC94310-xxYMT

Murata⁽⁷⁾

Capacitor, 1µF Ceramic, 10V, X7R, Size 0402

Micrel, Inc.⁽⁸⁾

200mA LDO with Ripple Blocker Technology

Notes:

7. Murata: www.murata.com.

8. Micrel, Inc.: www.micrel.com.

September 11, 2014

Revision 2.1

Micrel, Inc.

MIC94310

Package Information and Recommended Landing Pattern⁽⁹⁾

4-Ball 0.88mm × 0.88mm WLCSP (CS)

Note:

9. Package information is correct as of the publication date. For updates and most current information, go to www.micrel.com.

September 11, 2014

Revision 2.1

Micrel, Inc.

MIC94310

Package Information and Recommended Landing Pattern⁽⁹⁾(Continued)

4-Pin 1.2mm × 1.6mm Thin DFN (MT)

September 11, 2014

Revision 2.1

Micrel, Inc.

MIC94310

Package Information and Recommended Landing Pattern⁽⁹⁾(Continued)

5-Pin SOT-23 (M5)

September 11, 2014

Revision 2.1

Micrel, Inc.

MIC94310

MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA

TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com

Micrel, Inc. is a leading global manufacturer of IC solutions for the worldwide high performance linear and power, LAN, and timing & communications

markets. The Company’s products include advanced mixed-signal, analog & power semiconductors; high-performance communication, clock

management, MEMs-based clock oscillators & crystal-less clock generators, Ethernet switches, and physical layer transceiver ICs. Company

customers include leading manufacturers of enterprise, consumer, industrial, mobile, telecommunications, automotive, and computer products.

Corporation headquarters and state-of-the-art wafer fabrication facilities are located in San Jose, CA, with regional sales and support offices and

advanced technology design centers situated throughout the Americas, Europe, and Asia. Additionally, the Company maintains an extensive network

of distributors and reps worldwide.

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

Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product

can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant

into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A

Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully

indemnify Micrel for any damages resulting from such use or sale.

September 11, 2014

Revision 2.1

MIC94310-NYMT-TR [MICROCHIP]

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