Datasheet > RT6206B

RT6206B

更新时间： 2024-01-10 06:34:59

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
18页	287K
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技术参数
数据手册

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RT6206B 技术参数

Status：	Active	Vin (min) (V)：	4.5
Vin (max) (V)：	18	Number of Outputs：	1
Vout (min) (V)：	0.765	Vout (max) (V)：	7
Preset Vout (V)：		Output Adj. Method：	Resistor
Iout (max) (A)：	5.5	Current Limit (typ) (A)：	6.9
Freq (typ) (kHz)：	650	Freq (min) (kHz)：
Freq (max) (kHz)：		Ext Sync：	No
Ron_HS (typ) (mOhm)：	80	Ron_LS (typ) (mOhm)：	35
Iq (typ) (mA)：	1	Features：	ACOT Control;Cycle-by-Cycle Current Limit;OCP;OVP;PSM;Stable with Ceramic Capacitor
Package Type：	TSSOP-14(PP);WDFN3x3-10;PSOP-8

RT6206B 数据手册

RT6206B

Functional Block Diagram

VINR*

VREG5

BOOT

POR &

Reg

Min.

Off-Time

VREG5

VIN

VBIAS

REF

Control

Driver

UV & OV

PGND

GND*

REG5

Ripple

Gen.

6µA

Comparator

PGOOD*

Comparator

0.9 x V

REF

On-Time

* : VINR, GND pin for TSSOP-14 (Exposed Pad) only.

* : PGOOD pin for TSSOP-14 (Exposed Pad) and WDFN-10L 3x3 only.

Operation

The RT6206B is a synchronous step-down converter with

advanced constant on-time control mode. Using the

ACOT^TMcontrol mode can reduce the output capacitance

and provide fast transient response. It can minimize the

component size without additional external compensation

network.

UVLO Protection

To protect the chip from operating at insufficient supply

voltage, the UVLO is needed. When the input voltage of

VIN is lower than the UVLO falling threshold voltage, the

device will be latch-off.

Thermal Shutdown

Internal Regulator

When the junction temperature exceeds the OTP

threshold value, the IC will shut down the switching

operation. Once the junction temperature cools down and

is lower than the OTP lower threshold, the converter will

automatically resume switching

The regulator provides 5.1V power to supply the internal

control circuit. Connecting a 1μF ceramic capacitor for

decoupling and stability is required.

Soft-Start

In order to prevent the converter output voltage from

overshooting during the startup period, the soft-start

function is necessary. The soft-start time is adjustable

and can be set by an external capacitor.

Power Good (for TSSOP-14 (Exposed Pad) and

WDFN-10L 3x3 only)

After soft-start is finished, the power good function will be

activated. When the FB is activated, the PGOOD will

become an open-drain output. If the FB is below, the

PGOOD pin will be pulled low.

is a registered trademark of Richtek Technology Corporation.

www.richtek.com

DS6206B-02 March 2017

1 2 345 6 7...18

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