Datasheet > RT5800

RT5800

更新时间： 2024-01-19 08:59:32

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
47页	2664K
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技术参数
数据手册

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RT5800 技术参数

Status：	Active	Vin (min) (V)：	3
Vin (max) (V)：	6	Number of Outputs：	3
Vout (min) (V)：	0.3	Vout (max) (V)：	1.85
Preset Vout (V)：		Output Adj. Method：	Digital
Iout (max) (A)：	5.5	Current Limit (typ) (A)：	7
Freq (typ) (kHz)：	2100	Freq (min) (kHz)：	1850
Freq (max) (kHz)：	2500	Ext Sync：	No
Ron_HS (typ) (mOhm)：	25	Ron_LS (typ) (mOhm)：	15
Iq (typ) (mA)：	0.07	Features：	ACOT Control;Built-in Bootstrap Switch;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OTP;OVP;SCP;Selectable (PSM or PWM);Stable with Ceramic Capacitor;UVP
Package Type：	WQFN4.5x5-30(FC)

RT5800 数据手册

RT5800

= 5V

VUVLO

VIN

= 1.8V

VIO

SW EN

Discharge

resistor off

VOUT of

Buckx

VOUT of

Buckx

EN Delay Time

(Factory Setting)

Setting

70μs

Discharge

resistor on

230μs

Boot

Time

Digital/I C work

Figure 3. Start-up Sequence

Figure 6. Power-off Sequence by Software

= 5V

VUVLO

VIN

Power Good Indication

= 1.8V

The RT5800 provides a power good indication and this

function shows the status of output voltage. When

output voltage is between 110% and 90% of setting

voltage for each Buck, the PG indication bit goes high.

The relative registers are 0x14[7], 0x15[7] and 0x16[7].

VIO

VOUT of

Buckx

Fault Detection and Interrupt Pin

SW EN

The RT5800 alerts the host when a warning, like Boot

and Hot Die, or fault events, like over-voltage,

under-voltage and over-temperature conditions have

occurred. Registers 0x13, 0x14, 0x15 and 0x16 can

help host to know if the fault or waning event happens.

These bits relative to events can be read and cleared.

Moreover, the RT5800 provides an interrupt pin with

the push-pull output capability and this pin shows these

events by using active low. When INT function is used,

set 0x33[6] = 1, 0x34[6] = 1 and 0x35[6] = 1. The pull

high output voltage of INT pin will be VIO voltage.

mask function to mask or pass the event flag output to

external interrupt pin. The overall detection function is

shown in Figure 7.

EN Delay Time

(Factory Setting)

Setting

230μs

Boot

Time

70μs

Figure 4. Start-up Sequence by Software

= 5V

VIN

VIO

= 1.8V

VOUT of

Buck

Disable Delay Time

(Factory Setting)

Figure 5. Power-off Sequence

is a registered trademark of Richtek Technology Corporation.

DS5800-00 November 2019

www.richtek.com

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