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參數(shù)資料
| 型號： | L4969MD |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | SYSTEM VOLTAGE REGULATOR WITH FAULT TOLERANT LOW SPEED CAN-TRANSCEIVER |
| 中文描述： | 系統(tǒng)電壓調(diào)節(jié)器容錯低速的CAN收發(fā)器 |
| 文件頁數(shù)： | 9/35頁 |
| 文件大?。?/td> | 337K |
| 代理商： | L4969MD |
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L4969
1
FUNCTIONAL DESCRIPTION
1.1
The L4969 is a monolithic integrated circuit which provides all main functions for an automotive body
CAN network.
It features two independent regulated voltage supplies V1 and V2, an interrupt and reset logic with internal clock
generator, Serial Interface and a low speed CAN-bus transceiver which is supplied by a separate third voltage
regulator (V3).
The device guarantees a clearly defined behavior in case of failure, to avoid permanent CAN bus errors.
The device operates in four basic modes, with additional programming for V1 Standbymodes in CTCR:
General Features
(*1) Note, that in order to enter either Standby #1 or Standby #2 the Startup-Watchdog has to be acknowledged (see Chapter 1.2), in Standby
#1, the Window Watchdog has to be disabled as described in Chapter 2.5, to allow the decativation of the internal oscillator.
1.1.1 V1 Output Voltage
The V1 regulator uses a DMOS transistor as an output stage. With this structure very low dropout voltage is
obtained. The dropout operation of the standby regulator is maintained down to 4V input supply voltage. The
output voltage is regulated up to the transient input supply voltage of 40V. With this feature no functional inter-
ruption due to overvoltage pulses is generated. The output 1 regulator is switched off in sleep mode.
1.1.2 V2 Output Voltage
The V2 regulator uses the same output structure as the output 1 regulator except to being short circuit proof to
VS, and to be rated for the output current of 200mA. The V2 output can be switched on and off through a ded-
icated enable bit in the control register. In addition a tracking option can be enabled to allow V2 follow V1 with
constant offset. This feature allows consistent A/D conversion inside the
μ
C (supplied by V1) when the convert-
ed signals are referenced to V2. The maximum voltage that can be applied to V2 is VS + 0.3V up to a max VS
of 40V.
1.1.3 V3 Output Voltage
The third voltage regulator of the device generates the supply voltage for the internal logic and the CAN-trans-
ceiver. In operating mode it is capable of supplying up to 200mA in order to guarantee the required short circuit
current for the CAN_H driver. The sleep and operating modes are switched through a dedicated enable bit.
1.1.4 Internal Supply Voltage
A low power sleep mode regulator supplies the internal logic in sleep mode.
Mode
V1
V2
V3
Timer/WDC
CAN-IF
I
typ
LP1, LP0
(CTCR)
Remarks
Sleep #1
Off
Off
Off
Off
Standby
40u
x,x
No Timer based wakeup
Sleep #2
Off
Off
Off
On (250KHz)
Standby
80u
x,x
Timer active
Standby #1
(*1)
On
Off
Off
Off
Standby
170u
1,1
No Watchdog or Timer
Standby #2
(*1)
On
Off
Off
On (250KHz)
Standby
210u
1,0
Watchdog or timer active
Standby #3
On
Off
Off
On (1MHz)
Standby
440u
0,0
Watchdog or timer activ, POR default
RXOnly
Off
Off
On
On (1MHz)
RX-Only
4mA
x,x
Active during Busactivity to filter ID, auto-
matic fall back to Sleep when Bus idle
Normal
On
On
On
On (1MHz)
Normal
5mA
x,x
No Currents from CAN or Regulators
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L4969UR | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) BODY SMARTPOWER RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| L4969URD | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) BODY SMARTPOWER RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| L4969URD-E | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) BODY SMARTPOWER RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| L4969URDTR | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) BODY SMARTPOWER RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| L4969URDTR-E | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) BODY SMARTPOWER RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負(fù)載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
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