33394 datasheet(2/44 Pages) FREESCALE

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33394

MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA

Figure 1. 33394DH – Simplified Block Diagram and Typical Application

CAN

Wakeup

Logic

Band Gap

Reference

Standby

Control

VREF1

5.0 V

100 mA

LDO

T–Lim, I–Lim

VPP

5.0 V/3.3 V

150 mA

LDO

T–Lim, I–Lim

VDD3_3

3.3 V

120 mA

LDO, Pass

T–Lim, I–Lim

VDDL Drive

Adj. Volt.

40 mA

Dual Pass

T–Lim

Reset

Detection

VDDH,

VDD3_3,

VDDL

VDDH

5.0 V

400 mA

LDO

T–Lim, I–Lim

VREF2

5.0 V

100 mA

LDO

T–Lim, I–Lim

VREF3

5.0 V

100 mA

LDO

T–Lim, I–Lim

16 Bit

SPI

Control

Fault Rep.

POR Timer

Sleep

High–Speed CAN

Transceiver

10 nF

1.0

10 nF

1.0

10 nF

1.0

10 nF

VSEN

VBAT Volt.

125 mA

T–Lim, I–Lim

VKAM

Keep–Alive

Adj. Volt.

60 mA

I–Lim

GND

CANL

CANTXD

CANH

CANRXD

10 nF

2.6 V

100

Buck

Control

Logic

Boost

VPRE

MJD31C

10 nF

VDDH

5.0 V

CANRXD

42–44

BOOT

High–Side

Drive

Low–Side

Drive

Oscillator

Feed

Forward

Ramp

Generator

–

100

Enable

Sleep

10 k

110R

100R

VDDL

2.6 V

3.3 V

VREF1

VPP_EN

VPP

VDD3_3

VDD3_FB

VDDL_B

SCLK

/SLEEP

VREF3

VREF2

VDDH

5.0 V

47 k

HRT

/PRERESET

/HRESET

/PORESET

VDDL_X

VDDL_FB

5.0 V

5.0 V/3.3 V

WAKEUP

REGON

VSEN

VKAM

VKAM_FB

VIGN

KA_VBAT

1, 2

VBAT

4.7 k

OFF

Control

Dp2

Dp1

To Q3

Cf1

Cf2

Lf1

6.8

–

Vbg

11.7 k

40 k

Cc1

VPRE_S

VPRE

VCOMP

100 pF

INV

GND

SW2G

SW1

100 nF

MTD20N03HDL

Cc2

1.0 nF

Rc2

100 k

Cc3

3.3 nF

Rc3

430R

VPRE

5.6 V

22 k

20 k

VQ3

VKAM

2.6 V

Vbg

Notes: 1. In this configuration the device can operate with a minimum input voltage VBAT of 4.0 V (voltage at 33394 VBAT pins).

Notes: 2.VDDL and VKAM are adjustable to support current microprocessor technology (1.25 V to 3.3 V) by means of an external resistor divider.

Notes: 3. When the 33394 CAN transceiver is not used, CANL and CANH pins can be shorted together.

Notes: 4. Dp1 = reverse battery protection diode. Dp2 = load dump protection diode. Dp1, Dp2 can be ommitted in those applications which do not require such protection.

120 R

1.0

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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