Datasheet > BD820F50EFJ-C

BD820F50EFJ-C

更新时间： 2023-09-03 20:25:15

品牌	Logo	应用领域
罗姆 - ROHM		复位电路电容器稳压器
页数	文件大小	规格书
41页	1259K
描述
BD820F50EFJ-C是45V高耐压稳压器，内置监视其输出的复位电路(RESET)及看门狗计时器(WDT)。输出电流能力为200mA，但待机电流很小，适合用来降低系统的消耗电流。稳压器输出低于4.2V(Typ)时输出复位信号。复位延迟时间、看门狗计时器监视时间可通过外置电容器进行调整。We recommend BD820F5UEFJ-C for your new development. It uses different production lines for the purpose of improving production efficiency. Electric characteristics noted in Datasheet does not differ between Production Line.

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BD820F50EFJ-C 数据手册

BD820F50EFJ-C BD820F5UEFJ-C

Electrical Characteristics - continued

Reset, WDT Function

Unless otherwise specified, Tj = -40 °C to +150 °C, V_CC= 13.5 V, I_O= 0 mA, the typical value is defined at Tj = +25 °C

Limit

Parameter

Symbol

Unit

Conditions

Min

Typ

Max

4.31

Reset Detection Voltage

Reset Detection Hysteresis

Reset Low Voltage

V_RT

V_RHY

V_{RO_L}

V_CTH

V_CTL

I_{CT_C}

I_{CT_D}

t_D

4.09

4.20

100

0.80

0.40

4.0

1.0

0.4

3 V ≤ V_O≤ V_RT, R_RO= 5.1 kΩ

CT Upper-side Threshold

CT Lower-side Threshold

CT Charge Current

μA

V_CT= 0.20 V

CT Discharge Current

Delay Time L→H

V_CT= 1.00 V

C_CT= 0.1 μF^{(Note 1)}

V_RO< 0.5 V, R_RO= 5.1 kΩ

V_CLK= 5 V

WDT Monitor Time

t_WH

WDT Reset Time

t_WL

Minimum Operation Voltage

CLK Input Current

V_OPR

I_CLK

1.5

μA

μs

CLK Input Pulse Width

t_PCLK

CLK Input High Level Voltage V_HCLKV_O× 0.8

V_O

CLK Input Low Level Voltage

INH Input Current

V_LCLK

I_INH

V_HINH

V_LINH

1.5

V_O× 0.3

μA

V_INH= 5 V

INH Input High Level Voltage

INH Input Low Level Voltage

V_O× 0.8

V_O

V_O× 0.3

(Note 1) t_D, t_WH, and t_WLcan be adjustable by changing the CT pin capacitance value. ( 0.047 μF to 10 μF available )

t_D[s] = 0.2 x C_CT[F] x 10⁶The accuracy of adjustment: Typical value+35 %+1 ms, -40 %

t_WH[s] = 0.4 x C_CT[F] x 10⁶The accuracy of adjustment: Typical value±40 %

t_WL[s] = 0.1 x C_CT[F] x 10⁶The accuracy of adjustment: Typical value±40 %

The capacitance which is lower than or equal to 0.047 µF can be also used for C_CT, if wider deviation of t_Dcan be accepted because of an effect by

internal delay.

In addition, the deviation of the external component, (e.g.) capacitance, DC bias, and temperature characteristic, is not considered in these formula.

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TSZ22111 • 15 • 001

TSZ02201-0JAJ0AN00020-1-2

9.Nov.2021 Rev.002

10/38

1...7 8 91011 12 13...41

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