MIC94163YCS [MICROCHIP]

BUF OR INV BASED PRPHL DRVR;


型号：	MIC94163YCS
厂家：	MICROCHIP
描述：	BUF OR INV BASED PRPHL DRVR 驱动接口集成电路
文件：	总12页 (文件大小：720K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

MIC94161/2/3/4/5

3A High-Side Load Switch

with Reverse Blocking

General Description

Features

The MIC94161/2/3/4/5 is a family of high-side load

switches designed to operate from 1.7V to 5.5V input

voltage. The load switch pass element is an internal

14.5mΩ R_DSONN-Channel MOSFET which enables the

device to support up to 3A of continuous current.

Additionally, the load switch supports 1.5V logic level

control and shutdown features in a tiny 1.5mm × 1mm

6-ball WLCSP package.

• 1.5mm × 1mm 6-ball WLCSP package

• 14.5mΩ R_DSON

• 1.7V to 5.5V input voltage range

• 3A continuous operating current

• Reverse current flow blocking (no “body diode”)

• Internal level shift for CMOS/TTL control logic

• Ultra-low quiescent current

The MIC9416x provides reverse current protection when

the device is disabled. The device will not allow the flow of

current from the output to the input when the device is

turned OFF. Additionally, the MIC94161 features

overvoltage protection to protect the load when the input

voltage is above 4.55V, as well as a precise enable

threshold which keeps the MIC94161 in the default OFF

state until the EN pin rises above 1.15V.

• Micropower shutdown current

• Soft-start: MIC94161/4/5 (2.7ms)

• Load discharge circuit: MIC94162/4

• Ultra-fast turn-off time

• Junction operating temperature from −40°C to +125°C

Applications

• Solid state drives (SSD)

• Smart phones and tablets

• Personal media players (PMP)

• Ultra mobile PCs

• Portable instrumentation

• GPS modules

The MIC94161/2/3/4/5 operating voltage range makes

them ideal for Lithium-ion and NiMH/NiCad/Alkaline

battery-powered systems, as well as non-battery-powered

applications. The devices provide low quiescent current

and low shutdown current to maximize battery life.

Datasheets and support documentation are available on

Micrel’s web site at: www.micrel.com.

• Datacom equipment

Typical Application

MIC94161 (2.7ms Soft Start with OVP)

MIC94163 (Ultra-Fast Turn On)

MIC94165 (2.7ms Soft Start)

MIC94162 (Ultra-Fast Turn On with Auto Discharge)

MIC94164 (2.7ms Soft Start with Auto Discharge)

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

Revision 1.1

March 14, 2014

Micrel, Inc.

MIC94161/2/3/4/5

Ordering Information

Part Number

Marking

OVP

Turn-On Time

Active Discharge Package

MIC94161YCS

MIC94162YCS

MIC94163YCS

MIC94164YCS

MIC94165YCS

Yes

2.7ms

60µs

Yes

1.5mm × 1mm 6-Ball WLCSP

60µs

1.5mm × 1mm 6-Ball WLCSP

2.7ms

Yes

Pin Configuration

6-Ball 1.5mm × 1mm WLCSP (CS)

(Top View)

Pin Description

Pin Number

A1, B1

Pin Name

Pin Function

VOUT

GND

VIN

Source of N-channel MOSFET.

Ground.

A2, B2

Input Supply: Drain of N-channel MOSFET.

Enable (Input): Active-high control input for switch. Internal 2MΩ pull-down resistor. Output will be

off if this pin is left floating.

Revision 1.1

March 14, 2014

Micrel, Inc.

MIC94161/2/3/4/5

Absolute Maximum Ratings⁽¹⁾

Operating Ratings⁽²⁾

Input Voltage (V_IN)........................................... −0.3V to +6V

Enable Voltage (V_EN) ...................................... −0.3V to +6V

Continuous Drain Current (I_D)⁽³⁾.....................................±3A

Storage Temperature (T_s) .........................–55°C to +150°C

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

Input Voltage (V_IN)...........................................+1.7 to +5.5V

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

Package Thermal Resistance

1.5mm × 1mm 6-Ball WLCSP (θ_JA) .................108°C/W

Electrical Characteristics

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

Parameter

General

Symbol

Condition

Min.

Typ.

Max.

Units

5.5

1.5

Operating Input Voltage Range

V_IN

1.7

Enable Threshold Voltage

(MIC94161)

V_ENTH

V_IN= 1.7V to 5.5V , I_OUT= 250μA

1.15

Logic Low, OFF; V_IN= 1.8V to 5.5V;

0.375

_OUT= 250μA; −40˚C ≥ T_J≤ 85˚C

Logic High, ON; V_IN= 1.7V to 5.5V;

_OUT= 250μA; −40˚C ≥ T_J≤ 125˚C

Enable Threshold Voltage

(MIC94162/3/4/5)

V_ENTH

1.2

Enable Input Current

I_EN

I_Q

V_IN= V_EN= 3.6V ; I_OUT= 0

µA

Quiescent Current (MIC94161)

Quiescent Current (MIC94162/3)

Quiescent Current (MIC94164/5)

Shutdown Current

V_IN= V_EN= 3.6V ; I_OUT= 0

0.1

I_Q

V_IN= V_EN= 3.6V ; I_OUT= 0

I_Q

V_IN= V_EN= 3.6V ; I_OUT= 0

I_SD

I_LEAK

V_IN= 5.5V ; V_EN= 0V ; I_OUT= Open

V_IN= 5.5V ; V_EN= 0V ; I_OUT= Short

OFF State Leakage Current

Reverse Leakage Current

(MIC94161,3,5)

I_LEAKR

V_IN= 0V ; V_OUT= 5.5V ; V_EN= 0V

0.1

µA

V_IN= 5.5V ; V_EN= 1.5V ; I_OUT= 3A

V_IN= 4.5V ; V_EN= 1.5V ; I_OUT= 3A

V_IN= 3.6V ; V_EN= 1.5V ; I_OUT= 3A

V_IN= 2.7V ; V_EN= 1.5V ; I_OUT= 3A

V_IN= 1.8V ; V_EN= 1.5V ; I_OUT= 3A

V_IN= 1.7V ; V_EN= 1.5V ; I_OUT= 3A

14.5

15.5

17.5

N-Channel ON-Resistance

R_DS(ON)

mΩ

Overvoltage Protection Threshold

(MIC94161)

4.5

V_OVP

R_AD

V_IN= V_EN; I_OUT= 0; V_INrising

4.75

200

Active Discharge Resistance

(MIC94162/4)

400

V_IN= 3.6V ; I_TEST= 1mA ; V_EN= 0V

Notes:

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

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

3. With thermal contact to PCB (see Application Information).

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

Revision 1.1

March 14, 2014

Micrel, Inc.

MIC94161/2/3/4/5

Electrical Characteristics (Continued)

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

Parameter

Symbol

Condition

Min.

Typ.

Max.

Units

Timing Characteristics

V_IN= 3.6V ; R_LOAD= 1.2Ω ;

C_OUT= 200μF ; V_EN= 1.5V

Turn-On Delay Time (MIC94162/3)

Turn-On Rise Time (MIC94162/3)

t_ON

t_r

t_ON

t_r

t_OFF

t_f

µs

V_IN= 3.6V ; R_LOAD= 1.2Ω ;

C_OUT= 200μF ; V_EN= 1.5V

Turn-On Delay Time

(MIC94161/4/5)

V_IN= 3.6V ; R_LOAD= 1.2Ω ;

0.4

2.7

µs

C_OUT= 200μF ; V_EN= 1.5V

Turn-On Rise Time

(MIC94161/4/5)

V_IN= 3.6V ; R_LOAD= 1.2Ω ;

C_OUT= 200μF ; V_EN= 1.5V

V_IN= 3.6V ; R_LOAD= 1.2Ω ;

Turn-Off Delay Time

Turn-Off Fall Time

C_OUT= 200μF ; V_EN= 1.5V

V_IN= 3.6V ; R_LOAD= 1.2Ω ;

500

µs

C_OUT= 200μF ; V_EN= 1.5V

Revision 1.1

March 14, 2014

Micrel, Inc.

MIC94161/2/3/4/5

Timing Diagrams

Figure 1. Output Voltage Rise and Fall time Measurements

Figure 2. Output Voltage Turn On and Turn Off Measurements

Revision 1.1

March 14, 2014

Micrel, Inc.

MIC94161/2/3/4/5

Typical Characteristics

On Resistance

vs. Temperature

Voltage Drop

vs. Output Current

RDSON

vs. Input Voltage

V_IN= 1.7V

V_IN= 2.7V

V_IN= 3.6V

V_IN= 5.5V

V_IN= 1.7V

T = 25°C

V_IN= 3.6V

V_IN= 5.5V

I_OUT= 3A

-40 -20

100 120

100

1000

10000

1.5

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

TEMPERATURE (°C)

OUTPUT CURRENT (mA)

INPUT VOLTAGE (V)

Enable Threshold vs.

Input Voltage (MIC94162/3/4/5)

Temperature (MIC94162/3/4/5)

Input Voltage (MIC94161)

800

750

700

650

600

550

500

450

400

800

750

700

650

600

550

500

1.35

1.34

1.33

1.32

1.31

1.3

1.29

1.28

1.27

V_IN= 3.6V

T = 25°C

1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

-40 -20

80 100 120

1.5

2.5

3.5

4.5

INPUT VOLTAGE (V)

TEMPERATURE (°C)

INPUT VOLTAGE (V)

Quiescent Current vs.

Quiescent vs.

Input Voltage (MIC94161)

Input Voltage (MIC94162/3)

Input Voltage (MIC94164/5)

V_EN= 1.5V

1.5

2.5

3.5

4.5

5.5

1.5

2.5

3.5

4.5

5.5

1.5

2.5

3.5

4.5

5.5

QUIESCENT CURRENT (µA)

INPUT VOLTAGE (V)

Revision 1.1

March 14, 2014

Micrel, Inc.

MIC94161/2/3/4/5

Typical Characteristics (Continued)

Quiescent Current vs.

Temperature (MIC94161)

Temperature (MIC94162/3)

Temperature (MIC94164/5)

V_IN= 3.6V

-40 -20

100 120

-40 -20

100 120

-40 -20

100 120

TEMPERATURE (°C)

OVP Threshold vs.

TON Delay vs.

Rise Time vs.

Temperature (MIC94161)

Input Voltage (MIC94162/3)

4.7

250

200

150

100

4.69

4.68

4.67

4.66

4.65

4.64

4.63

I_OUT= 100mA

C_OUT= 10µF

I_OUT= 100mA

C_OUT= 10µF

I_OUT= 100mA

-40 -20

80 100 120

1.5

2.5

3.5

4.5

5.5

1.5

2.5

3.5

4.5

5.5

INPUT VOLTAGE (V)

TEMPERATURE (°C)

INPUT VOLTAGE (V)

TON Delay vs.

Input Voltage (MIC94161/4/5)

2000

1800

1600

1400

1200

1000

800

I_OUT= 100mA

C_OUT= 10µF

600

400

200

1.5

2.5

3.5

4.5

5.5

INPUT VOLTAGE (V)

Revision 1.1

March 14, 2014

Micrel, Inc.

MIC94161/2/3/4/5

Functional Characteristics

Revision 1.1

March 14, 2014

Micrel, Inc.

MIC94161/2/3/4/5

Maximum Current vs.

Ambient Temperature

(1" Square Copper)

Application Information

The MIC94161/2/3/4/5 is a family of high-side load

switches designed to operate from 1.7V to 5.5V input

voltage. The load switch pass element is an internal

14.5mΩ R_DSONN-Channel MOSFET which enables the

device to support up to 3A of continuous current.

Additionally, the load switch supports 1.5V logic level

control and shutdown features in a tiny 1.5mm × 1mm

6-ball WLCSP package.

3.5

2.5

1.5

VIN = 5v

VIN = 4v5

VIN = 3v6

VIN=2v5

The MIC9416x provides reverse current protection when

the device is disabled. The device will not allow the flow

of current from the output to the input when the device is

turned OFF. Additionally, the MIC94161 features

overvoltage protection to protect the load when the input

voltage is above 4.55V, as well as a precise enable

threshold which keeps the MIC94161 in the default OFF

state until the EN pin rises above 1.15V.

0.5

-60 -40 -20

20 40 60 80 100 120 140

AMBIENT TEMPERATURE (°C)

Figure 3. Safe Operating Area (SOA) Graph

Power Dissipation Considerations

The MIC94162/3 features rapid turn on for applications

that require quick startup time. The MIC94161/4/5

provides a slew rate controlled soft-start turn-on of 2.7ms.

The soft-start feature is provided to prevent an in-rush

current event from pulling down the input supply voltage.

As with all power switches, the current rating of the

switch is limited mostly by the thermal properties of the

package and the PCB it is mounted on. There is a simple

ohms law type relationship between thermal resistance,

power dissipation and temperature, which are analogous

to an electrical circuit:

The MIC94162/4 feature an active load discharge circuit

which switches in a 200Ω load when the switch is

disabled to automatically discharge a capacitive load.

An active pull-down on the enable input keeps the

MIC94161/2/3/4/5 in a default OFF state until the enable

pin is pulled above 1.2V. Internal level shift circuitry

allows low voltage logic signals to switch higher supply

voltages. The enable voltage can be as high as 5.5V and

is not limited by the input voltage.

Power Switch SOA

Figure 4. Simple Electrical Circuit

The safe operating area (SOA) curve represents the

boundary of maximum safe operating current and

maximum safe operating junction temperature.

From this simple circuit we can calculate V_Xif we know

I_SOURCE, V_Zand the resistor values, R_XYand R_YZusing

Equation 1:

Figure 3 illustrates the SOA for various input voltages,

with the package mounted on a typical 1 layer, 1 square

inch copper board.

V_X= I_SOURCE(R_XY+ R_YZ) + V_Z

Eq. 1

Thermal circuits can be considered using these same

rules and can be drawn similarly by replacing current

sources with power dissipation (in watts), resistance with

thermal resistance (in °C/W) and voltage sources with

temperature (in °C).

Revision 1.1

March 14, 2014

Micrel, Inc.

MIC94161/2/3/4/5

junction temperature of 125°C, in this case can be 30%

higher (see the “On Resistance vs. Temperature” graph

in the Typical Characteristics section):

R_SW(MAX)= 27mΩ

Eq. 3

Therefore:

_RISE= (3A²× 27mΩ) × 108°C/W = 26.2°C

Figure 5. Simple Thermal Circuit

Now replacing the variables in the equation for V_X, one

can find the junction temperature (T_J) from power

dissipation, ambient temperature and the known thermal

resistance of the PCB (Rθ_CA) and the package (Rθ_JC).

T_J= T_RISE+ T_A= 26.2°C + 80°C = 106.2°C

P_DISSis calculated as I_SW²× R_SW(MAX). Rθ_JCis found in the

operating ratings section of the datasheet and Rθ_CA(the

PCB thermal resistance) values for various PCB copper

areas is discussed in the document Designing with Low

Dropout Voltage Regulators available from the Micrel

website.

This is below the maximum 125°C.

Example:

A switch is intended to drive a 3A load and is placed on a

printed circuit board which has a ground plane area of at

least 25mm × 25mm (625mm²). The voltage source is a

Li-ion battery with a lower operating threshold of 3V and

the ambient temperature of the assembly can be up to

80°C.

Summary of variables:

•

I_SW= 3A

V_IN= 3V to 4.2V

T_A= 80°C

Rθ_JA= 108°C/W

_DISS= I_SW²x R_SW

The worst case switch resistance (R_SW) at the lowest V_IN

of 3V is not available in the datasheet, so the next lower

value of V_INis used, as shown in Equation 2

_SW@ 2.7V = 21mΩ

Eq. 2

If this were a figure for worst case R_SWfor 25°C, an

additional consideration is to allow for the maximum

Revision 1.1

March 14, 2014

Micrel, Inc.

MIC94161/2/3/4/5

Package Information⁽⁵⁾and Recommended Landing Pattern

1.5mm × 1mm 6-Ball WLCSP

Note:

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

Revision 1.1

March 14, 2014

Micrel, Inc.

MIC94161/2/3/4/5

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 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.

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.

Revision 1.1

March 14, 2014

MIC94163YCS [MICROCHIP]

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