LTC1163CN8_技术文档

LTC1163/LTC1165

Triple 1.8V to 6V High-Side

MOSFET Drivers

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DESCRIPTIO

EATURE

S

F

■

Operates from 1.8V to 6V

The LTC1163/LTC1165 triple low voltage MOSFET drivers

make it possible to switch supply or ground referenced

loadsthroughinexpensive,lowR_DS(ON)N-channelswitches

from as little as a 1.8V supply. The LTC1165 has inverting

inputs and makes it possible to directly replace P-channel

MOSFET switches while maintaining system drive polar-

ity. The LTC1163 has noninverting inputs.

0.01µA Standby Current

95µA Operating Current per Channel at 3.3V

Fully Enhances N-Channel Switches

No External Charge Pump Components

Built-In Gate Voltage Clamps

Easily Protected Against Supply Transients

Controlled Switching ON and OFF Times

Compatible with 5V, 3V and Sub-3V Logic Families

Available in 8-Pin SOIC

Micropower operation, with 0.01µA standby current and

95µA operating current, coupled with a power supply

range of 1.8V to 6V, make the LTC1163/LTC1165 ideally

suited for 2- to 4-cell battery-powered applications. The

LTC1163/LTC1165 are also well suited for sub-3V, 3.3V

and 5V nominal supply applications.

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PPLICATI

A

S

■

PCMCIA Card 3.3V/5V Switch

2-Cell High-Side Load Switching

Boost Regulator Shutdown to Zero Standby Current

Replacing P-Channel Switches

Notebook Computer Power Management

Palmtop Computer Power Management

Portable Medical Equipment

The LTC1163/LTC1165 internal charge pumps boost the

gatevoltage8Vabovea3.3Vrail, fullyenhancing inexpen-

sive N-channels for high- or low-side switch applications.

The LTC1163/LTC1165 are available in both an 8-pin DIP

and an 8-pin SOIC.

Mixed 3.3V and 5V Supply Switching

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TYPICAL APPLICATI

2-Cell Triple High-Side Switch

MOSFET Switch Gate Voltage

(1.8V TO 3V)

18

16

14

+

2-CELL

BATTERY

PACK

10µF

RFD14N05LSM RFD14N05LSM RFD14N05LSM

12

10

8

V

S

IN1

IN2

IN3

OUT1

OUT2

OUT3

CONTROL

LTC1163

LTC1165

LOGIC

OR µP

GND

6

2-CELL

LOAD

2-CELL

LOAD

2-CELL

LOAD

4

LTC1163 HAS NONINVERTING INPUTS

LTC1165 HAS INVERTING INPUTS

2

0

LTC1163/65 • TA01

0

1

2

5

6

3

4

SUPPLY VOLTAGE (V)

LTC1163/65 • TA02

1

LTC1163/LTC1165

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ABSOLUTE AXI U RATI GS

Supply Voltage ......................................................... 7V

Any Input Voltage .......................... 7V to (GND – 0.3V)

Any Output Voltage....................... 20V to (GND – 0.3V)

Current (Any Pin)................................................. 50mA

Operating Temperature Range

LTC1163C/LTC1165C ........................... 0°C to 70°C

Storage Temperature Range ................ –65°C to 150°C

Lead Temperature (Soldering, 10 sec)................. 300°C

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PACKAGE RDER I FOR ATIO

ORDER PART

TOP VIEW

NUMBER

IN1

IN2

1

2

3

4

8

7

6

5

V

S

IN1

IN2

1

2

3

4

V

S

8

7

6

5

LTC1163CS8

LTC1165CS8

OUT1

OUT2

OUT3

OUT1

OUT2

OUT3

LTC1163CN8

LTC1165CN8

IN3

GND

S8 PART MARKING

N8 PACKAGE

8-LEAD PLASTIC DIP

S8 PACKAGE

8-LEAD PLASTIC SOIC

1163

1165

T_JMAX= 100°C, θ_JA= 150°C/W

T_JMAX= 100°C, θ_JA= 130°C/W

V_S= 1.8V to 6V, T_A= 25°C, unless otherwise noted.

ELECTRICAL CHARACTERISTICS

LTC1163C/LTC1165C

SYMBOL

PARAMETER

CONDITIONS

V = 1.8V, V = V = V = V (Note 1,2)

MIN

TYP

MAX

UNITS

I

Quiescent Current OFF

0.01

1

µA

Q

S

IN1

IN2

IN3

OFF

V = 3.3V, V = V = V = V (Note 1,2)

S

IN1

IN2

IN3

OFF

V = 5V, V = V = V = V (Note 1,2)

S

IN1

IN2

IN3

OFF

Quiescent Current ON

Input High Voltage

V = 1.8V, V = V (Note 2,3)

60

95

180

120

200

400

µA

S

IN

ON

V = 3.3V, V = V (Note 2,3)

S

IN

ON

V = 5V, V = V (Note 2,3)

S

IN

ON

V

1.8V < V < 2.7V

●

80% × V

70% × V

V

INH

S

2.7V < V < 6V

S

Input Low Voltage

Input Current

1.8V < V < 6V

●

15% × V

±1

V

µA

pF

INL

S

I

0V ≤ V ≤ V

IN S

IN

C

V

Input Capacitance

Gate Voltage Above Supply

5

IN

– V

V = 1.8V, V = V (Note 2)

●

3.5

4.0

4.5

6.0

5.0

4.1

4.6

5.2

8.0

9.0

6.0

7.0

8.0

9.5

13.0

V

GATE

S

IN

ON

V = 2V, V = V (Note 2)

S

IN

ON

V = 2.2V, V = V (Note 2)

S

IN

ON

V = 3.3V, V = V (Note 2)

S

IN

ON

V = 5V, V = V (Note 2)

S

IN

ON

t

Turn-ON Time

V = 3.3V, C

Time for V

= 1000pF

ON

S

GATE

> V + 1V

40

60

120

180

400

600

µs

S

> V + 2V

S

V = 5V, C

Time for V

= 1000pF

S

GATE

> V + 1V

30

40

95

130

300

400

µs

GATE

S

> V + 2V

S

2

LTC1163/LTC1165

ELECTRICAL CHARACTERISTICS ^V_S^{= 1.8V to 6V, T}_A^{= 25°C, unless otherwise noted.}

LTC1163C/LTC1165C

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

t

Turn-OFF Time

V = 3.3V, C

Time for V

= 1000pF

< 0.5V

OFF

S

GATE

20

15

65

200

150

µs

V = 5V, C

= 1000pF

< 0.5V

S

GATE

Time for V

45

µs

GATE

The

●

denotes specifications which apply over the full operating

Note 2: LTC1163: V = 0V, V = V . LTC1165: V = V , V = 0V

OFF ON S OFF S ON

temperature range.

Note 3: Quiescent current ON is per driver and is measured independently.

Note 1: Quiescent current OFF is for all channels in OFF condition.

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TYPICAL PERFOR A CE CHARACTERISTICS

Standby Supply Current

Supply Current per Driver ON

Gate Voltage Above Supply

5

4

600

500

400

300

200

100

0

12

10

8

T

= 25°C

T

= 25°C

A

T

= 25°C

A

ALL THREE INPUTS = OFF

ONE INPUT = ON

OTHER INPUTS = OFF

3

2

6

1

4

0

2

–1

0

2

3

4

5

6

1

0

2

3

4

5

6

0

2

3

4

5

6

1

SUPPLY VOLTAGE (V)

LTC1163/65 • TPC01

LTC1163/65 • TPC02

LTC1163/65 • TPC03

Turn-OFF Time

Input Threshold Voltage

Turn-ON Time

6

5

4

3

2

1

0

600

500

400

300

200

100

0

300

250

200

150

100

50

C

= 1000pF

T

= 25°C

C

= 1000pF

GATE

TIME FOR V

A

GATE

< 0.5V

GATE

V

HI

V

= 2V

GS

V

LO

V

= 1V

GS

4

0

2

3

4

5

6

0

2

3

5

6

0

2

3

4

5

6

1

SUPPLY VOLTAGE (V)

LTC1163/65 • TPC04

LTC1163/65 • TPC05

LTC1163/65 • TA06

3

LTC1163/LTC1165

TYPICAL PERFOR A CE CHARACTERISTICS

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Standby Supply Current

Supply Current per Driver ON

MOSFET Gate Drive Current

5

4

1000

100

10

300

250

200

150

100

50

T

A

= 25°C

3

V

= 5V

S

V

S

= 5V

2

V

S

= 3.3V

V

= 3.3V

= 1.8V

S

1

V

0

V

= 1.8V

V = 2.2V

S

–1

0

0.1

0

10

20

30

40

50

60

70

0

10

20

30

40

50

60

70

0

2

4

6

8

10

TEMPERATURE (°C)

GATE VOLTAGE ABOVE SUPPLY (V)

LTC1163/65 • TPC07

LTC1163/65 • TPC08

LTC1163/65 • TPC09

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PI FU CTIO S

Input Pins

Output Pins

The LTC1163 is noninverting; i.e., the MOSFET gate is

driven above the supply when the input pin is held high.

TheLTC1165isinvertinganddrivestheMOSFETgatehigh

when the input pin is held low. The inverting inputs of the

LTC1165 allow P-channel switches to be replaced by

lower resistance/cost N-channel switches while maintain-

ing system drive polarity.

The output pin is either driven to ground when the switch

is turned OFF or driven above the supply rail when the

switch is turned ON. The output is clamped to about 14V

above ground by a built-in Zener clamp. This pin has a

relatively high impedance when driven above the rail (the

equivalent of a few hundred kΩ). Care should be taken to

minimize any loading of this pin by parasitic resistance to

ground or supply.

The LTC1163/LTC1165 logic inputs are high impedance

CMOS gates with ESD protection diodes to ground and

therefore should not be forced below ground. The inputs

can however, be driven above the power supply rail as

therearenoclampingdiodesconnectedbetweentheinput

pins and supply pin. This facilitates operation in mixed

5V/3V systems.

Supply Pin

A 150Ω resistor should be inserted in series with the

ground pin or supply pin if negative supply voltage tran-

sients are anticipated. This will limit the current flowing

from the power source into the LTC1163/LTC1165 to tens

of milliamps during reverse battery conditions.

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OPERATIO

The input threshold voltage is set at roughly 50% of the

supply voltage and approximately 200mV of input hyster-

esis is provided to ensure clean switching.

The LTC1163/LTC1165 are triple micropower MOSFET

drivers designed for operation over the 1.8V to 6V supply

range and include the following functional blocks:

The input enables all of the following circuit blocks: the

bias generator, the high frequency oscillator and gate

charge pump. Therefore, when the input is turned off, the

entire circuit powers down and the supply current drops

below 1µA.

3V Logic Compatible Inputs

The LTC1163/LTC1165 inputs have been designed to

accommodate a wide range of 3V and 5V logic families.

4

LTC1163/LTC1165

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OPERATIO

Gate Charge Pump

Controlled Gate Rise and Fall Times

Gate drive for the power MOSFET is produced by an

internal charge pump circuit which generates a gate volt-

age substantially higher than the power supply voltage.

The charge pump capacitors are included on chip and

thereforenoexternalcomponentsarerequiredtogenerate

gate drive.

When the input is switched ON and OFF, the gate is

charged by the internal charge pump and discharged in a

controlled manner. The charge and discharge rates have

been set to minimize RFI and EMI emissions.

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BLOCK DIAGRA

(One Channel)

LTC1165

LTC1163

HIGH

FREQUENCY

OSCILLATOR

CHARGE

GATE

PUMP

GATE

DISCHARGE

BIAS

GENERATOR

INPUT

LOGIC

14V

LTC1163/65 • BD

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APPLICATIO S I FOR ATIO

Logic-Level MOSFET Switches

For example, if a 100µF capacitor is powered through a

switchwithaslewrateof0.1V/µs, thecurrentduringstart-

up is:

The LTC1163/LTC1165 are designed to operate with

logic-level N-channel MOSFET switches. Although there

is some variation among manufacturers, logic-level

MOSFET switches are typically rated with V_GS= 4V with

a maximum continuous V_GSrating of ±10V. R_DS(ON)and

maximum V_DSratings are similar to standard MOSFETs

and there is generally little price differential. Logic-level

MOSFETs are frequently designated by an “L” and are

usually available in surface mount packaging. Some

logic-level MOSFETs are rated with V_GSup to ±15V and

can be used in applications which require operation over

the entire 1.8V to 6V range.

I_START= C(∆V/∆t)

= (100 × 10^–6)(1 × 10⁵)

= 10A

Obviously, this is too much current for the regulator (or

output capacitor) to supply and the output will glitch by as

much as a few volts.

The startup current can be substantially reduced by limit-

ing the slew rate at the gate of an N-channel as shown in

Figure 1. The gate drive output of the LTC1163/LTC1165

is passed through a simple RC network, R1 and C1, which

substantially slows the slew rate of the MOSFET gate to

approximately 1.5 × 10^–4V/µs. Since the MOSFET is

operating as a source follower, the slew rate at the source

is essentially the same as that at the gate, reducing the

startup current to approximately 15mA which is easily

Powering Large Capacitive Loads

Electrical subsystems in portable battery-powered equip-

ment are typically bypassed with large filter capacitors to

reduce supply transients and supply induced glitching. If

not properly powered however, these capacitors may

themselves become the source of supply glitching.

5

LTC1163/LTC1165

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APPLICATIO S I FOR ATIO

3.3V

on a 3.3V supply which is compatible with 5V TTL and

CMOS logic. (The LTC1163/LTC1165 cannot however, be

driven by 3V logic when powered from a 5V supply

because the threshold is approximately 2.5V.)

LT1129-3.3

V

IN

+

3.3µF

R1

100k

R2

1k

V

S

OUT1

MTD3055EL

3.3V

C1

0.1µF

1/3 LTC1163

GND

+

ON/OFF

IN1

C

L

100µF

V

3.3V

LOAD

S

5V

OUT1

MTD3055EL

1/3 LTC1163

LTC1163/65 • F01

IN1

3.3V

LOAD

GND

Figure 1. Powering a Large Capacitive Load

LTC1163/65 • F01

managed by the system regulator. R2 is required to

eliminate the possibility of parasitic MOSFET oscillations

duringswitchtransitions.Itisagoodpracticetoisolatethe

gates of paralleled MOSFETs with 1k resistors to decrease

the possibility of interaction between switches.

Figure 2. Direct Interface to 5V Logic

Reverse Battery Protection

The LTC1163/LTC1165 can be protected against reverse

battery conditions by connecting a 150Ω resistor in series

with the ground pin or supply pin. The resistor limits the

supply current to less than 24mA with –3.6V applied.

Because the LTC1163/LTC1165 draw very little current

while in normal operation, the drop across the resistor is

minimal.The3.3VµP(orcontrollogic)canbeprotectedby

adding 10k resistors in series with the input pins.

Mixed 5V/3V Systems

BecausetheinputESDprotectiondiodesarereferencedto

ground instead of the supply pin, it is possible to drive the

LTC1163/LTC1165 inputs from 5V CMOS or TTL logic

even though the LTC1163/LTC1165 are powered from a

3.3V supply as shown in Figure 2. The input threshold

voltageisapproximately50%ofthesupplyvoltageor1.6V

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TYPICAL APPLICATIO S

PCMCIA Card 3.3V/5V V_CCSwitch

5V

+

10µF

PCMCIA

CONTROLLER

1/2 MMDF3N02HD

V

CC

S

V

5V

3V

IN1

OUT1

OUT2

OUT3

CC

+

LTC1165

PC

1µF

V

IN2

IN3

CARD

SOCKET

MMDF3N02HD

GND

LTC1163/65 • TA03

3.3V

NOTE: USE LTC1163 WITH NONINVERTING PCMCIA CONTROLLERS

6

LTC1163/LTC1165

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TYPICAL APPLICATIO S

2-Cell to 3.3V, 5V and 12V High-Side Switch/Converter

with 0.01µA Standby Current

+

2-CELL

BATTERY

PACK

100µF

6.3V

V

S

IN1

IN2

IN3

OUT1

OUT2

OUT3

RFD14N05LSM

CONTROL

LOGIC

OR µP

LTC1163

LTC1165

RFD14N05LSM

GND

MBRS120T3

100µH

3.3V

22µH

MBRS120T3

22µH

47Ω

MBRS120T3

12V

5V

1

3

1

3

1

2

3

39k

7

8

7

8

LT1109CS8-12

4

LT1109CS8-5

4

LT1173CS8

+

10µF

20V

22µF

16V

220µF

6.3V

24k

4

5

LTC1163/65 • TA04

PCMCIA Card Socket V_PPSwitch/Reglator

MMDF3N02HD

MURS120T3

1

3

33µH

7,8

V

= 3.3V

OR 5V

V

= 0V, 3.3V,

CC

PP

5V, 12V, OR HI-Z

+

3

1M

100µF

6.3V

1/4 74HC02

1

8

LT1109ACS8-12

1N4148

EN0

1N4148

2

4

5,6

EN0

EN1 OUTPUT

7

+

0

1

0

1

0

1

0V

47µF

16V

12V

4

V

CC

V

S

HI-Z

1/4 74HC02

IN1

OUT1

OUT2

OUT3

LTC1163

1/4 74HC02

IN2

IN3

2N7002

EN1

GND

LTC1163/65 • TA05

Ultra-Low Drop Triple 3.3V High-Side Switch

3.3V

+

MTD

3055EL

MTD

3055EL

MTD

3055EL

10µF

V

S

(11V)

IN1

IN2

IN3

OUT1

OUT2

OUT3

3.3V

LOGIC

OR µP

LTC1163

LTC1165

GND

3.3V

LOAD

3.3V

LOAD

3.3V

LOAD

LTC1163/65 • TA06

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-

tationthattheinterconnectionofitscircuitsasdescribedhereinwillnotinfringeonexistingpatentrights.

7

LTC1163/LTC1165

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TYPICAL APPLICATI S

Mixed Voltage High- and Low-Side Switches

3.3V

12V

5V

+

Si9956DY

10µF

V

S

12V

IN1

IN2

IN3

OUT1

OUT2

OUT3

LOAD

5V

LOGIC

OR µP

LTC1163

LTC1165

IRFR024

GND

5V

LOAD

3.3V

LOAD

LTC1163/65 • TA07

3-Cell to 3.3V Ultra-Low Drop Regulator with 2 Ramped Switches

+

3-CELL

BATTERY

PACK

10µF

MTD3055EL

3.3V

OUTPUT

MTD3055EL

1k

MTD3055EL

1k

1

3

V

S

+

220µF

6.3V

IN1

IN2

IN3

OUT1

OUT2

OUT3

510pF

3.3k

10k

CONTROL

LTC1163

LTC1165

LOGIC

LT1431

5

OR µP

8

GND

3.3V

LOAD

6

100k 100k

LOAD

680Ω

0.1µF

LTC1163/65 • TA08

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Dimensions in inches (millimeters) unless otherwise noted.

PACKAGE DESCRIPTIO

0.400

(10.160)

MAX

0.130 ± 0.005

0.045 – 0.065

0.300 – 0.320

(7.620 – 8.128)

(3.302 ± 0.127)

(1.143 – 1.651)

N8 Package

8

7

6

5

4

8-Lead

0.065

(1.651)

TYP

Plastic DIP

0.250 ± 0.010

(6.350 ± 0.254)

0.009 – 0.015

(0.229 – 0.381)

0.125

(3.175)

MIN

0.020

(0.508)

MIN

+0.025

–0.015

0.045 ± 0.015

(1.143 ± 0.381)

1

8

2

0.325

3

+0.635

8.255

(

)

–0.381

0.100 ± 0.010

(2.540 ± 0.254)

0.018 ± 0.003

(0.457 ± 0.076)

0.189 – 0.197

(4.801 – 5.004)

7

5

6

0.010 – 0.020

(0.254 – 0.508)

× 45°

0.053 – 0.069

(1.346 – 1.752)

S8 Package

8-Lead

Plastic SOIC

0.004 – 0.010

(0.101 – 0.254) 0.228 – 0.244

(5.791 – 6.197)

0.008 – 0.010

(0.203 – 0.254)

0.150 – 0.157

(3.810 – 3.988)

0°– 8° TYP

0.016 – 0.050

0.406 – 1.270

0.050

0.014 – 0.019

(0.355 – 0.483)

(1.270)

BSC

1

2

3

4

LT/GP 1093 10K REV 0 • PRINTED IN USA

LINEAR TECHNOLOGY CORPORATION 1993

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7487

8

●

(408) 432-1900 FAX: (408) 434-0507 TELEX: 499-3977


型号：	LTC1163CN8
厂家：	Linear
描述：	Triple 1.8V to 6V High-Side MOSFET Drivers 三重1.8V至6V的高边MOSFET驱动器驱动器
文件：	总8页 (文件大小：233K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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