RT9701CB各脚功能电路原理芯片引脚定义引脚图及功能IC贸易商-中国IC网-芯三七

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产品型号RT9701CB的概述

RT9701CB芯片概述 RT9701CB是一种高性能的电源管理芯片，广泛应用于各种消费电子产品，如智能手机、平板电脑及其他移动设备。该芯片集成了多种功能，包括电源开关、充电管理和电压调节等，使其在复杂的电源管理应用中表现出色。RT9701CB具有较高的集成度，能够显著减少外部元件的使用，从而降低总的设计成本和面积。 RT9701CB的详细参数 RT9701CB芯片的主要参数包括： - 输入电压范围：支持4.5V至28V的宽输入电压范围，适应多种电源输入环境。 - 输出电压范围：能够稳定输出多个电压等级，最常见的为3.3V和5V。 - 最大输出电流：一般情况下，RT9701CB支持高达1A的输出电流，满足大多数典型负载需求。 - 充电模式：具备多种充电模式，如涓涓充电和快速充电，可根据需要进行设置。 - 功率效率：该芯片在不同的工作状态下均能维持较高的功率转换效率，通常在85%以上。 ...

产品型号RT9701CB的Datasheet PDF文件预览

RT9701

100mΩ Power Distribution Switches

Features

General Description

The RT9701 is an integrated 100mΩ power switch

for self-powered and bus-powered Universal Series

Bus (USB) applications. A built-in charge pump is

used to drive the N-channel NMOSFET that is free

of parasitic body diode to eliminate any reversed

current flow across the switch when it is powered

off. Its low quiescent supply current (23µA) and

small package (SOT-25) is particularly suitable in

battery-powered portable equipment.

^z100mΩ Typ. High-Side NMOSFET (SOT- 25)

^zGuaranteed 1.1A Continuous Current

^z1.5A Current Limit

^zSmall SOT- 25 Package Minimizes Board Space

^zSoft Start

^zThermal Protection

^zLow 23µA Supply Current

^zWide Input Voltage Range: 2.2V ~ 6V

^zUL Approved - #E219878

Several protection functions include soft start to limit

inrush current during plug-in, current limiting at 1.5A

to meet USB power requirement, and thermal

shutdown to protect damage under over current

conditions.

Pin Configurations

Part Number

Pin Configurations

TOP VIEW

RT9701CBL

(Plastic SOT-25)

1. VOUT

2. GND

3. VIN

Applications

4. VIN

5. VOUT

^zBattery-Powered Equipment

^zMotherboard USB Power Switch

^zUSB Device Power Switch

^zHot-Plug Power Supplies

^zBattery-Charger Circuits

TOP VIEW

RT9701CB

(Plastic SOT-25)

1. VOUT

2. GND

3. VIN

4. CE

5. VOUT

Ordering Information

RT9701ꢀ ꢀꢀ

Typical Application Circuit

Package type

BL : SOT-25

B : SOT-25

RT9701 CBL

V_IN

VIN

V_OUT

VOUT

Operating temperature range

C: Commercial standard

VIN

VOUT

C_IN

1 µF

*C_OUT

470 µF

GND

Marking Information

Part Number

RT9701CBL

RT9701CB

Marking

* 470µF, Low ESR Electrolytic

DS9701-05 October 2001

www.richtek-ic.com.tw

RT9701

Pin Description

Pin Name

VIN

Pin Function

Power Input

Output Voltage

Ground

VOUT

GND

Chip Enable

Test Circuits

V_OUT

V_IN

I_OUT

RT9701 CBL

VIN

VOUT

VIN

VOUT

I_L

GND

R_L

C_IN

C_L

Test Circuit 1

V_OUT

V_IN

V_IN-SW

RT9701 CBL

VIN

VOUT

Switch Off

VIN

VOUT

GND

R_L

C_L

C_IN

Test Circuit 2

V_OUT

V_IN

I_OUT

RT9701 CB

VIN

VOUT

GND

V_CE

I_L

R_L

C_IN

C_L

Off

Test Circuit 3

Test Circuit 2 is performed by charging an external tank of bulk capacitor to the input then applying this voltage to

the input of the unit.

All typical operating characteristics curves showed are referred to Test Circuit 1, unless specified to Test Circuit 2

or Test Circuit 3.

www.richtek-ic.com.tw

DS9701-05 October 2001

RT9701

Function Block Diagram

VIN

Current

Limit

(VIN)

Bias

Charge

Pump

Control

(VOUT)

VOUT

NMOSFET

Thermal

Detection

Oscillator

GND

Absolute Maximum Ratings

z Supply Voltage

z Chip Enable

-0.3V ~ 7V

z Power Dissipation, P @ T = 25°C

SOT-25

0.25W

z Operating Junction Temperature Range

z Storage Temperature Range

-20°C ~ 100°C

-65°C ~ 150°C

z Package Thermal Resistance

SOT-25, θ

250°C /W

z V

ESD Level

OUT

HBM (Human Body Mode)

MM (Machine Mode)

8KV

800V

DS9701-05 October 2001

www.richtek-ic.com.tw

RT9701

Electrical Characteristics

(V = 5V, C = C

= 1µF, T = 25°C, unless otherwise specified)

OUT

Parameter

Input Voltage Range

Symbol

Test Conditions

Min

2.2

Typ

Max

Units

RT9701CBL

RT9701CB

I_L= 1A

100

105

130

135

mΩ

µA

Output NMOFET R

DS(ON)

I_L= 1A

V_IN= 3V

Supply Current

V_IN= 5V

Output Turn-On Rising Time

Current Limit Threshold

400

1.5

R_L= 10Ω, 90% Settling

R_L= 2Ω

µS

1.1

LIMIT

V_OUT

= 0V, measured

Short-circuit Fold Back Current

1.0

prior to thermal shutdown

CE Input High Threshold

CE Input Low Threshold

RT9701CB

2.0

0.8

Shutdown Supply Current RT9701CB

Output Leakage Current RT9701CB

CE = “0”

0.1

0.5

1.8

100

130

µA

OFF

CE = “0”, V_OUT= 0V

LEAKAGE

UVLO

1.3

Under Voltage Lockout

°C

Under Voltage Hysteresis

Thermal Limit

Thermal Limit Hysteresis

∆T

www.richtek-ic.com.tw

DS9701-05 October 2001

RT9701

Typical Operating Charateristics

Supply Current vs. Temp.

Supply Current vs. Voltage

V_IN= 5V

Ta = 25° C

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

-40 -20

100 120

V_INVVolotaltgaege(V()V)

Temperature (ºC)

On-Resistance vs. Temp.

On-Resistance vs. Voltage

160

140

120

100

160

V_IN= 5V

Ta = 25°C

T = 25°C

140

120

100

RT9701CBL

RT9701CB

RT9701CBL

-40

-20

100 120

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

Temperature ( C)

°C)

Voltage (V)

V_INVoltage (V)

Current Limit vs. Temp.

Current Limit vs. Voltage

2.20

2.00

1.80

1.60

1.40

1.20

1.00

0.80

0.60

1.80

1.58

1.35

1.13

0.90

0.68

0.45

0.23

0.00

T = 25°C

V_IN= 5V

-40

-20

100 120

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

Voltage (V)

°C)

V_INVoltage (V)

Temperature (

DS9701-05 October 2001

www.richtek-ic.com.tw

RT9701

Short Circuit Current vs. Temp.

Short Circuit Current vs. Voltage

1950

1700

1450

1200

950

1400

1300

1200

1100

1000

900

Ta = 25° C

V_IN= 5V

800

700

450

600

500

200

-40 -20

100 120

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

Voltage (V)

Temperature ( C)

°C)

V_INVoltage (V)

CE Threshold vs. Temp.

CE Threshold vs. Voltage

2.4

2.0

1.6

1.2

0.8

0.4

0.0

2.4

2.0

1.6

1.2

0.8

0.4

0.0

V_IN= 5V

Rising

Falling

Rising

Falling

T = 25

°C

2.0

2.5

3.0

3.5

4.0

4.5

5.0

5.5

6.0

-40

-20

100 120

Voltage (V)

Temperature (ºC) *Test Circuit 3

V_INVoltage (V) *Test Circuit 3

Turn On Rising Time vs. Temp.

Turn Off Falling Time vs. Temp.

720

630

540

450

360

270

180

140

120

100

V_IN= 5V

R_L= 30Ω

C_L= 1µ F Ceramic

R_L= 30Ω

C_L= 1µF Ceramic

-40 -20

°C)

100 120

-40 -20

100 120

Temperature (

*Test Circuit 3

Temperature (°C)

www.richtek-ic.com.tw

DS9701-05 October 2001

RT9701

Shutdown Supply Current vs. Temp.

Turn-Off Leakage Current vs. Temp.

0.9

0.8

0.6

0.5

0.3

0.2

0.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

V_IN= 5V

-40 -20

°C)

100 120

-40 -20

°C)

100 120

Temperature (

*Test Circuit 3

Temperature (

UVLO Threshold vs. Temp.

Inrush Current Response

3.50

3.00

2.50

2.00

1.50

1.00

0.50

0.00

V_IN= 5V

C_L= 100µF

C_L= 33µF

C_L= 1µF

432 >

= 5V, R = 1 ohm

=1A/Div

I_LOU=T1A/Div

R_LIN= 1Ω, V_INL = 5V

-40 -20

°C)

100 120

Time10

(

100µ0Sµ/DSi/v

Div)

Temperature (

Turn-On Response

Turn-Off Response

R_L= 30 Ω, C_L= 1µF

CH1

1 >

CH1

CH2

2 >

CH3

2 >

CH2

CH1: V_CE: 5V/Div

CH2: I_OUT: 100mA/Div; CH3: V_OUT: 2V/Div

3 >

CH1: V_CE: 5V/Div

CH2: V_OUT: 1V/Div

R_L= 30 Ω, C_L= 1µF

*Test Circuit 3

Time (50µS/Div)

Time (100µS/Div)

DS9701-05 October 2001

www.richtek-ic.com.tw

RT9701

UVLO at Rising

UVLO at Falling

CH1

CH2

1 >

CH1

CH1: V_IN: 1V/Div

1 >

CH2: V_OUT: 1V/Div

2 >

CH2

CH1: V_IN: 1V/Div

CH2: V_OUT: 1V/Div

2 >

R_L= 30 Ω, C_L= 1µF

*Test Circuit 2

Time (500µS/Div)

Time (10mS/Div)

Inrush Short Circuit Response

Soft-start Short Circuit Response

_DROP=1.2V, depend on C_INESR

I_PEAK: depend on ESR & ESL

1 >

CH1

CH1 : V_IN: 2V/Div

CH2 : I_L: 10A/Div

CH1 : V_IN: 2V/Div

CH2^{2 >}

C _IN

CH2 : I_OUT: 1A/Div

= 1µF

C_{L = 1000µF}

_IN= 1 F

50µS/Div

25 S/Div

Ramped Load Response

Current Limit Response

4.9V

V_OUT= 5V

V_OUT= 4.6V

CH1

Loading trigger

1 >

CH1

Current Limit Threshold

1.1A

2 >

1 >

CH2

V_IN= 5V, C_L= 0.1µF

R_L= 1Ωohm

CH2^{2 >}

CH2: I

: 1A/Div

5µS/Div

I_O_L_U_O_T_A:_D1A/Div

CH2: I_OUT: 500mA/Div V_IN= 5V, C_L= 1µF

1mS/Div

www.richtek-ic.com.tw

DS9701-05 October 2001

RT9701

Thermal Shut Down Response

CH1 ^{1 >}

CH3

Thermal Shut Down

2 >

CH2

CH1: V_CE: 5V/Div

CH3: I_OUT@R 1Ωoh:m1A: 5/D0i0vmA/Div

1A/Div

CH2: I_OUT@short : 500mA/Div

1A/Div

50mS/Div

V_IN= 5V

Time (50mS/Div)

Functional Description

Current Limiting and Short Protection

The RT9701 is a high-side single N-channel switch

with active-high enable input.

The current limit circuit is designed to protect the

system supply, the MOSFET switch and the load

from damage caused by excessive currents. The

current limit threshold is set internally to allow a

minimum of 1.1A through the MOSFET but limits the

output current to approximately 1.5A typical. When

the output is short to ground, it will limit to a constant

current 1A until thermal shutdown or short condition

removed.

Input and Output

VIN (input) is the power supply connection to the

circuitry and the drain of the output MOSFET. VOUT

(output) is the source of the output MOSFET. In a

typical circuit, current flows through the switch from

VIN to VOUT toward the load. Both VOUT pins must

be short on the board and connected to the load and

so do both VIN pins but connected to the power

source.

Thermal Shutdown

Thermal shutdown shuts off the output MOSFET if

the die temperature exceeds 130°C and 20°C of

hysteresis forces the switch turning off until the die

temperature drops to 110°C.

Soft Start

In order to eliminate the upstream voltage droop

caused by the large inrush current during hot-plug

events, the “soft-start” feature effectively isolates

power supplies from such highly capacitive loads.

Under-voltage Lockout

UVLO prevents the MOSFET switch from turning on

until input voltage exceeds 1.8V (typical). If input

voltage drops below 1.8V (typical), UVLO shuts off

the MOSFET switch.

DS9701-05 October 2001

www.richtek-ic.com.tw

RT9701

Applications Information

Ferrite beads in series with all power and ground

lines are recommended to eliminate or significantly

reduce EMI. In selecting a ferrite bead, the DC

resistance of the wire used must be kept to a

minimum to reduce the voltage drop.

RT9701CBL

VIN

V_OUT2

VOUT

V_OUT1

VOUT

C_IN

1 F

GND

C_OUT

Reverse current preventing

The output MOSFET and driver circuitry are also

designed to allow the MOSFET source to be

externally forced to a higher voltage than the drain

(VOUT > VIN ≥ 0). To prevent reverse current from

such condition, disable the switch (RT9701CB) or

connect VIN to a fixed voltage under 1.3V.

C_IN= 1 F, C_OUT= 470 F (Low ESR) on M/B

C_IN= 1 F, C_OUT= 330 F (Low ESR) on Notebook

C_IN= 10 F, C_OUT= 1 F on USB device

Fig. 1 High Side Power Switch

RT9701CB

Layout and Thermal Dissipation

VIN

V_OUT2

VOUT

z Place the switch as close to the USB connector as

possible. Keep all traces as short as possible to

reduce the effect of undesirable parasitic

inductance.

C_IN

V_OUT1

C_OUT

VOUT

GND

C_OUT

V_CE

z Place the output capacitor and ferrite beads as

OFF

close to the USB connector as possible.

Fig. 2 High Side Power Switch with Chip Enable Control

z If ferrite beads are used, use wires with minimum

resistance and large solder pads to minimize

connection resistance.

Filtering

To limit the input voltage drop during hot-plug events,

connect a 1µF ceramic capacitor from VIN to GND.

However, higher capacitor values will further reduce

the voltage drop at the input.

z If the package is with dual VOUT or VIN pins,

short both the same function pins as Fig.1 or Fig.2

to reduce the internal turn-on resistance. If the

output power will be delivered to two individual

ports, it is specially necessary to short both VOUT

pin at the switch output side in order to protect the

switch when each port are plug-in separately.

Connect a sufficient capacitor from VOUT to GND.

This capacitor helps to prevent inductive parasitics

from pulling VOUT negative during turn-off or EMI

damage to other components during the hot-

detachment. It is also necessary for meeting the USB

specification during hot plug-in operation. If RT9701

is implanted in device end application, minimum 1µF

capacitor from VOUT to GND is recommended and

higher capacitor values are also preferred.

z Under normal operating conditions, the package

can dissipate the channel heat away. Wide power-

bus planes connected to VIN and VOUT and a

ground plane in contact with the device will help

dissipate additional heat.

In choosing these capacitors, special attention must

be paid to the Effective Series Resistance, ESR, of

the capacitors to minimize the IR drop across the

capacitor’s ESR. A lower ESR on this capacitor can

get a lower IR drop during the operation.

www.richtek-ic.com.tw

DS9701-05 October 2001

RT9701

Package Information

Dimensions In Millimeters

Dimensions In Inches

Symbol

Min

Max

Min

Max

0.889

0.000

1.397

0.356

2.591

2.692

0.838

0.102

0.356

1.295

0.152

1.803

0.559

2.997

3.099

1.041

0.254

0.610

0.035

0.000

0.055

0.014

0.102

0.106

0.033

0.004

0.014

0.051

0.006

0.071

0.022

0.118

0.122

0.041

0.010

0.024

SOT- 25 Surface Mount Package

DS9701-05 October 2001

www.richtek-ic.com.tw

RT9701

RICHTEK TECHNOLOGY CORP.

Headquarter

RICHTEK TECHNOLOGY CORP.

Taipei Office (Marketing)

6F, No. 35, Hsintai Road, Chupei City

8F-1, No. 137, Lane 235, Paochiao Road, Hsintien City

Hsinchu, Taiwan, R.O.C.

Taipei County, Taipei, R.O.C.

Tel: (8863)5510047 Fax: (8863)5537749

Tel: (8862)89191466 Fax: (8862)89191465

Email: marketing@richtek-ic.com.tw

www.richtek-ic.com.tw

DS9701-05 October 2001

RT9701CB相关文章

配单直通车

深圳市中利达电子科技有限公司服务专线: 0755-83200645/13686833545 在线联系:

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柒号芯城电子商务（深圳）有限公司服务专线: 0755-83209937 在线联系:

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深圳市芯福林电子有限公司服务专线: 13418564337 在线联系:

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RT9703产品参数

型号:	RT9703
Status：	Active
Number of Outputs：	1
Vin (min) (V)：	2
Vin (max) (V)：	5.5
Ron (typ) (mOhm)：	80
Iq (typ) (mA)：	0.03
Current Limit (typ) (A)：
FLAG Indicator：	Yes
Iocp Adjustable：	Yes
Safety：
Features：	Adjustable Current Limit;Cycle-by-Cycle Current Limit;Enable Input;SCP
Package Type：	SOP-8

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产品型号RT9701CB的概述

产品型号RT9701CB的Datasheet PDF文件预览

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