Datasheet TCA5600 Datasheet (Motorola)

 

Order this document by TCA5600/D





 

The TCA5600, TCF5600 are versatile power supply control circuits for
microprocessor based systems and are mainly intended for automotive
applications and battery powered instruments. To cover a wide range of
applications, the devices offer high circuit flexibility with a minimum of
external components.

Functions included in this IC are a temperature compensated voltage
reference, on–chip dc/dc converter, programmable and remote controlled
voltage regulator, fixed 5.0 V supply voltage regulator with external PNP
power device, undervoltage detection circuit, power–on RESET delay and
watchdog feature for safe and hazard free microprocessor operations.

• 6.0 V to 30 V Operation Range

• 2.5 V Reference Voltage Accessible for Other Tasks

• Fixed 5.0 V ± 4% Microprocessor Supply Regulator Including Current

Limitation, Overvoltage Protection and Undervoltage Monitor.

• Programmable 6.0 V to 30 V Voltage Regulator Exhibiting High Peak

Current (150mA), Current Limiting and Thermal Protection.

• Two Remote Inputs to Select the Regulator’s Operation Mode:

OFF = 5.0 V, 5.0 V Standby
Programmable Output Voltage

• Self–Contained dc/dc Converter Fully Controlled by the Programmable

Regulator to Guarantee Safe Operation Under All Working Conditions

• Programmable Power–On RESET Delay

• Watchdog Select Input

• Negative Edge Triggered W atchdog Input

• Low Current Consumption in the V

• All Digital Control Ports are TTL and MOS–Compatible

Applications Include:

• Microprocessor Systems with E

• High Voltage Crystal and Plasma Displays

• Decentralized Power Supplies in Computer Telecom Systems

CC1

2

PROMs

Standby Mode

UNIVERSAL

MICROPROCESSOR POWER

SUPPLY/CONTROLLERS

SEMICONDUCTOR

TECHNICAL DATA

18

1

PLASTIC PACKAGE

CASE 707

PIN CONNECTIONS

RESET

V

Sense

out1

V

CC1
WDI

V

ref

INH1

V

Prog

out2

V

Output

out2

Converter Output

1
2
3
4
5
6
7
8
9

WDS

18

Delay

17

I

Sense

16

out1

Base Drive

15

V

14

CC2

GND

13

Current Sense

12

INH2

11

Converter Input

10

RECOMMENDED OPERATING CONDITIONS

Characteristics Symbol Min Max Unit

Power Supply Voltage V

Collector Current I
Output Voltage V
Reference Source Current I

V

CC1
CC2

C

out2

ref

MOTOROLA ANALOG IC DEVICE DATA

5.0

5.5
— 800 mA

6.0 30 V

0 2.0 mA

30
30

(Top View)

V

ORDERING INFORMATION

Operating

Device

TCA5600
TCF5600

 Motorola, Inc. 1996 Rev 0

Temperature Range

TJ = 0° to +125°C

TJ = – 40° to +150°C

Package

Plastic DIP
Plastic DIP

1

MAXIMUM RATINGS

Power Supply Voltage (Pin 3,14) V
Base Drive Current (Pin 15) I
Collector Current (Pin 10) I
Forward Rectifier Current (Pin 10 to Pin 9) I
Logic Inputs INH1, INH2, WDS

(Pin 6, 11, 18)
Logic Input Current WDI (Pin 4) I
Output Sink Current RESET (Pin 1) I
Analog Inputs (Pin 2)

Analog Inputs (Pin 7)

Reference Source Current (Pin 5) I
Power Dissipation (Note 2)

TA = +75°C TCA5600

TA = +85°C TCF5600
Thermal Resistance, Junction–to–Air R
Operating Ambient Temperature Range

TCA5600

TCF5600
Operating Junction Temperature Range

TCA5600

TCF5600
Storage Temperature Range T

NOTES: 1. Values beyond which damage may occur.

2.Derate at 10 mW/°C for junction temperature above +75°C (TCA5600).
Derate at 10 mW/°C for junction temperature above +85°C (TCF5600).

(TA = +25°C [Note 1], unless otherwise noted.)

Rating Symbol Value Unit

CC1

V

WDI
RES

P

TCA5600 TCF5600

, V

B

C

F

INP

ref

D

θJA

T

A

T

stg

CC2

J

35 Vdc
20 mA

1.0 A

1.0 A

–0.3 V to V

–0.3 to 5.0

–40 to +85

–65 to +150 °C

CC1

±0.5 mA

10 mA

–0.3 to 10

5.0 mA

500
650

100 °C/W

0 to +75

+125
+150

Vdc

V

mW

°C

°C

Inhibit 2

(INH2)

Inhibit 1

(INH1)

Supply
Voltage V

RESET

CC1

11

6

3

1

Comp. II

Representative Block Diagram

CC2

Converter

Input

Converter

Output

Current

Sense VProgramming

10 9 12 7 8 14 16

DC/DC

Converter

Reference

2.5V

Delay Circuit

17

Delay

out2

A2

Thermal

Shut–Down

Watchdog

WDS

WDI

out2

Regulator

V

Comp. I

Supply

Voltage V

Current

Limit

Current

Sense

135418

ref

V

A1

A1

Gnd

Voltage

Protection

15

PNP Base Drive

2

V

Sense

out1

2

MOTOROLA ANALOG IC DEVICE DATA

TCA5600 TCF5600

ELECTRICAL CHARACTERISTICS (V

Characteristics

= V

CC1

= 12 V; TJ = 25°C; I

CC2

INH2 = High; WDS

= High; I

= 0 [Note 4]; unless otherwise noted.)

out2

Figure Symbol Min Typ Max Unit

ref

REFERENCE SECTION

Nominal Reference Voltage 1 V
Reference Voltage

I

= 0.5 mA, T

ref

Line Regulation (6.0 V ≤ V
Average Temperature Coefficient

T

≤ TJ ≤ T

low

Ripple Rejection Ratio

f = 1.0 kHz, V

low

high

sin

≤ TJ ≤ T

(Note 5)

= 1.0 V

(Note 5), 6.0 V ≤ V

high

≤ 18 V) Reg

CC2

CC1

≤ 18 V

2 ∆V

3 RR 60 70 — dB

pp

Output Impedance

0 ≤ I

≤ 2.0 mA

ref

Standby Current Consumption

V

= Open

CC2

4 I

5.0 V MICROPROCESSOR VOLTAGE REGULATOR SECTION

Nominal Output Voltage V
Output Voltage

5.0 mA ≤ I

6.0 V ≤ V
Line Regulation (6.0 V ≤ V
Load Regulation (5.0 mA ≤ I
Base Current Drive (V
Ripple Rejection Ratio

f = 1.0 kHz, V

out1

CC2

≤ 18 V

sin

≤ 300 mA, T

CC2

= 6.0 V, V15 = 4.0 V) I

CC2

= 1.0 V

pp

low

≤ TJ ≤ T

high

(Note 5)

5
6

≤ 18 V) Reg

≤ 300 mA) Reg

out1

3 RR 50 65 — dB

Undervoltage Detection Level (RSC = 5.0 Ω) 7 V
Current Limitation Threshold (RSC = 5.0 Ω) V
Average Temperature Coefficient

T

low

≤ TJ ≤ T

high

(Note 5)

DC/DC CONVERTER SECTION

Collector Current Detection Level High

9 V12(H)

RC = 10 k Low

Collector Saturation Voltage

10 V

IC = 600 mA (Note 6)

Rectifier Forward Voltage Drop

11 V

IF = 600 mA (Note 6)

NOTES: 3. The external PNP power transistor satisfies the following minimum specifications:

hFE ≥ 60 at IC = 500 mA and VCE = 5.0 V;
V

≤ 300 mV at IB = 10 mA and IC = 300 mA

CE(sat)

4.Regulator V

5.T

= 0°C for TCA5600 T

low

T

= +125°C for TCA5600 T

high

6.Pulse tested tp ≤ 300 µs.

programmed for nominal 24 V output by means of R4, R5 (see Figure 1).

out2

= –40°C for TCF5600

low

= +150°C for TCF5600

high

= 0; I

out1

ref nom

V

ref

line
ref

∆T

J

Z

O

CC1

out1(nom)

V

out1

line

load

B

low

RSC

∆V

out1

∆T

J

V12(L)

CE(sat)

F

= 0 [Note 3]; RSC = 0.5 Ω; INH = High

2.42 2.5 2.58 V

2.4 — 2.6 V

— 2.0 15 mV
— — ±0.5 mV/°C

— 1.0 — Ω

— 3.0 — mA

4.8 5.0 5.2 V

4.75 — 5.25 V

— 10 50 mV
— 20 100 mV
10 15 — mA

4.5 0.93 × V

out1

— V

210 250 290 mV

— — ±1.0 mV/°C

350

—

400

50

450

—

— — 1.6 V

— — 1.4 V

mV

MOTOROLA ANALOG IC DEVICE DATA

3

TCA5600 TCF5600

ELECTRICAL CHARACTERISTICS

ELECTRICAL CHARACTERISTICS INH2 = High; WDS = High; I

Characteristics

(V

CC1

= V

= 12 V; TJ = 25°C; I

CC2

ref

= 0 [Note 4]; unless otherwise noted.)

out2

Symbol Min Typ Max Unit

PROGRAMMABLE VOLTAGE REGULATOR SECTION (Note 6)

Nominal Output Voltage V
Output Voltage (Figure 8)

1.0 mA ≤ I
Load Regulation 1.0 mA ≤ I

≤ 100 mA, T

out2

≤ TJ ≤ T

low

≤ 100 mA (Note 7) Reg

out2

(Notes 5, 7)

high

out2(nom)

V

DC Output Current I
Peak Output Current (Internally Limited) I

out2 p

Ripple Rejection Ratio

f = 20 kHz, V = 0.4 V

Output Voltage (Fixed 5.0 V)

1.0 mA ≤ I

INH1 = HIGH (Note 5)

out2

pp

≤ 20 mA, T

low

≤ TJ ≤ T

high

V

out2(5.0 V)

Off State Output Impedance (INH2 = Low) R
Average Temperature Coefficient

T

low

≤ TJ ≤ T

high

(Note 5)

∆V

∆TJV

WATCHDOG AND RESET CIRCUIT SECTION

Threshold Voltage High

(Static) Low

Current Source T

Power–Up RESET

low

≤ TJ ≤ T

high

(Note 5)

V

V

Watchdog Time Out

Watchdog RESET
Watchdog Input V oltage Swing V
Watchdog Input Impedance r
Watchdog Reset Pulse Width (C8 = 1.0 nF) (Note 9) t

DIGITAL PORTS: WDS, INH 1, INH 2, RESET (Note 8)

Input Voltage Range V
Input High Current

2.0 V ≤ VIH ≤ 5.5 V

5.5 V ≤ VIH ≤ V

CC1

Input Low Current

–0.3 V ≤ VIL ≤ 0.8 V for INH1, INH2, –0.3 V ≤ VIL ≤ 0.4 V for WDS
Leakage Current Immunity (INH2, High “Z” State) (Figure 12) I
Output Low Voltage RESET (IOL = 6.0 mA) V
Output High Voltage RESET (VOH = 5.5 V) V

NOTES: 3. The external PNP power transistor satisfies the following minimum specifications:

hFE ≥ 60 at IC = 500 mA and VCE = 5.0 V;
V

≤ 300 mV at IB = 10 mA and IC = 300 mA

CE(sat)

4.Regulator V

5.T

= 0°C for TCA5600 T

low

T

= +125°C for TCA5600 T

high

6.V9 = 28 V, INH1 = LOW for this Electrical Characteristic section unless otherwise noted.

7.Pulse tested tp ≤ 300 µs.

8.Temperature range T

9.For test purposes, a negative pulse is applied to Pin 4 (–2.5 V ≥ V4 ≥ –5.5 V).

programmed for nominal 24 V output by means of R4, R5 (see Figure 1).

out2

low

≤ TJ ≤ T

= –40°C for TCF5600

low

= +150°C for TCF5600

high

applies to this Electrical Characteristics section.

high

= 0; I

= 0 [Note 3]; RSC = 0.5 Ω; INH = High

out1

23 24 25 V

out2

load

out2

22.8 — 25.2 V

— 40 200 mV
100 — — mA
150 200 — mA

RR 45 55 — dB

4.75 — 5.25 V

out1

out2

— 10 — kΩ

— — ±0.25 mV/°C V

out2

C5(H)

C5(L)

I

C5

WDI

i

p

INP

I

IH

I

IL

Z

OL

OH

—

—

–1.8

—

—

— — ±5.5 V

12 15 — kΩ

— — 10 µs

— — –0.3 to V

—

—

— — –100
±20 — — µA

— — 0.4 V

— — 20 µA

2.5

1.0

–2.5

5×I

–50×I

—
—

C5

C5

—
—

–3.2

—
—

CC1

100
150

V

µA

V

µA

µA

4

MOTOROLA ANALOG IC DEVICE DATA

Figure 1. Reference V oltage versus Supply Voltage

2.4

2.0

1.6

1.2

, REFERENCE VOLTAGE (V)

0.8

0.4

ref nom

V

0

1.0 2.0 3.0 4.0 5.0 10 20 30 40
V

, SUPPLY VOLTAGE (V)

CC1

Figure 2. Reference Stability versus T emperature

TCA5600 TCF5600

V

CC1

+

NC
NC

NC

61118
3
12

4

NC NC

V

out2

86k

10k

R4

R5

10

V

914

ref nom

R

SC

Ω

0.5

16

µ

F

Q1
BD242SP

V

out1

+

C410

15

2

15781317

60
40
20

+0

–20

, VOLTAGE DRIFT (mV)

ref

–40

V

∆

–60

–50 –25 0 25 50 75 100 125 150

TJ, JUNCTION TEMPERATURE (

TCA5600

TCF5600

°

C)

Figure 3. Ripple Rejection versus Frequency

70
60

50
40
30
20
10

RR, RIPPLE REJECTION RATIO (dB)

0

1.0 k 10 k 100 k 1.0 M

V

out1

f,FREQUENCY (Hz)

V

ref

V

+

Ω

= 1.0 V

150

+

V

CC1

CC1

R3

Ω

61118
3
12

NC

4

NC

NC NC

V

out2

PP

0.33µF
C6

61118
3
12

NC

4

NC

NC NC

V

out2

R4

86k

R5

10k

R4

86k

R5

10k

NC
10

∆

NC

10

914

15781317

V

ref

914

15781317

V

ref nom

16

15

16

15

R

SC

Ω

0.5

Q1
BD242SP

2

µ

F

+

V

nom

ref

R

SC

0.5

Ω

2

µ

+

C410

Q1
BD242SP

+

F

V

out1

V

out1

C410

MOTOROLA ANALOG IC DEVICE DATA

5

TCA5600 TCF5600

Figure 4. Standby Current versus Supply V oltage

6
5
4
3
2

, STAND–BY CURRENT (mA)

CC1

I

1
0

6
5
4
3
2

, OUTPUT VOL TAGE (V)

out1

1

V

0

2.0 3.01.0 4.0 5.0 10 20 30 40
V

, SUPPLY VOLTAGE (IV)

CC1

Figure 5. Power–Up Behavior of the 5.0 V Regulator

I

= 300 mA

out

2.0 3.01.0 4.0 5.0 10 20 30 40
V

, SUPPLY VOLTAGE (IV)

CC2

R

I

V

CC1

CC1

+

V

CC1

+

61118
3
12

NC

4

NC

NC NC

V

out2

61118
3
12

NC

4

NC

NC NC

V

out2

R4

86k

R5

10k

R4

86k

R5

10k

NC
10

NC
10

914

15781317

V

ref

914

15781317

16.7
R

out1

V

ref

SC

Ω

0.5

16

R

0.5

µ

SC

I

out1

Q1
BD242SP

+

F

Ω

Q1
BD242SP

+

C410

C4
10

V

out1

V

out1

µ

F

15

2

16

15

2

Ω

Figure 6. Foldback Characteristics of the 5.0 V Regulator

7.0

6.0

5.0

4.0

3.0

, SUPPLY VOLTAGE (V)

2.0

CC2

1.0

V

0

0 100 200 300 400 500 600

28 V 24 V

I

, OUTPUT CURRENT (mA)

out1

6

V

CC2

≤20 V

R

16

15

SC

0.5

Ω

Q1
BD242SP

2

I

out1

100

Ω

V

out1

+

C4

µ

F

10

R4

86k

R5

10k

NC
10

914

15781317

R

out1

V

ref

V

CC1

+

+

V

CC1

61118
3
12

NC

4

NC

NC NC

V

out2

MOTOROLA ANALOG IC DEVICE DATA

TCA5600 TCF5600

Figure 7. Undervoltage Lockout Characteristics

7
6
5
4
3

, RESET VOL TAGE (V)

2

RES

V

1
0

0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0

V

, OUTPUT VOLTAGE (V)

out1

Figure 8. Output Current Capability of the Programming Regulator

28
24
20
16
12

, SUPPLY VOLTAGE (V)

8.0

g

V

4.0
0

0 20 40 60 80 100 120 140 160

I

, OUTPUT CURRENT (mA)

out2

R

16

15

16

15

2

R6

10k

2

0.5

R

0.5

SC

SC

µ

Ω

Q1
BD242SP

Ω

Q1
BD242SP

F

V

out1

+

C4
10

µ

F

V

out1

+

C410

R4

86k

R5

10k

R4

86k

R5

10k

NC
10

V

NC
10

914

15781317

RESET

ref

914

15781317

V

ref

V

CC1

+

+

V

9

+

V

CC1

R

61118
3
12

NC

4

NC

NC

V

out2

61118
3
12

NC

4

NC

NC NC

I

out2

out2

5.0k

C3

47nF

Figure 9. Collector Current Detection Level

16

12

8.0

, COLLECTOR VOLTAGE (V)V

4.0

10

0

V

12(L)

0 100 200 300 400 500

V

CURRENT SENSE VOLTAGE (mV)

12,

V

MOTOROLA ANALOG IC DEVICE DATA

12(H)

10k

R

R4

86k

R5

10k

10

C

V

ref

V

+

V

CC1

V

12

61118 914
3
12

4

NC

NC NC

V

out2

10

R

SC

Ω

0.5

16

µ

F

Q1
BD242SP

V

out1

+

C410

15

2

15781317

7

Figure 10. Power Switch Characteristics

1.8

1.6

1.4

1.2

, SATURATION VOLTAGE (V)

1.0

CE(sat)

0.8

V

0.6
10 20 30 50 80 100 200 300 500 800

I

, COLLECTOR CURRENT (mA)

C10

Figure 11. Rectifier Characteristics

1.8

1.6

1.4

1.2

1.0

, FORWARD VOLTAGE (V)

F

V

0.8

0.6
10 20 30 50 80 100 200 300 500 800

IF,

RECTIFIER CURRENT (mA)

TCA5600 TCF5600

V

CC1

+

NC

V

CC1

+

NC
NC

61118 914

3
12

4

NC NC

V

out2

61118 914
3
12

4

NC NC

V

out2

R4

86k

R5

10k

R4

86k

R5

10k

10

10

15781317

V

ref

15781317

V

ref

I

C10

16

15

2

16

15

2

R

0.5

R

0.5

SC

µ

SC

µ

Ω

Q1
BD242SP

F

Ω

Q1
BD242SP

F

V

out1

+

C410

I

F

V

out1

+

C410

Figure 12. INH 2 Leakage Current Immunity

28
24
20
16
12

, OUTPUT VOL TAGE (V)V

8.0

out2

4.0
0

–40 –30 –20 –10 0 10 20 30 40

IZ, LEAKAGE CURRENT (

V

out2

Spec Limits

High “Z” State

V

10

µ

A)

8

V

CC1

10k

R

R4

86k

R5

10k

10

C

V

ref

V

+

I

Z

61118 914

3
12

4

NC

NC NC

V

out2

C3

47nF

10

R

SC

Ω

0.5

16

15

2

15781317

Q1
BD242SP

V

out1

+

C410µF

V

g

MOTOROLA ANALOG IC DEVICE DATA

TCA5600 TCF5600

(

)

(H)

APPLICATIONS INFORMATION

(See Figure 18)

V oltage Reference (V

The voltage reference V

)

ref

is based upon a highly stable

ref

bandgap voltage reference and is accessible on Pin 5 for
additional tasks. This circuit part has its own supply
connection on Pin 3 and is, therefore, able to operate in
standby mode. The RC network R3, C6 improves the ripple
rejection on both regulators.

DC/DC Converter

The dc/dc converter performs according to the flyback
principle and does not need a time base circuit. The
maximum coil current is well defined by means of the current
sensing resistor R1 under all working conditions (startup
phase, circuit overload, wide supply voltage range and
extreme load current change). Figure 13 shows the Simplified
Converter Schematic.

Figure 13. Simplified Converter Schematic

V

V
V

12(H)
12(L)

Control Feedback

+

CC2

Comp

0.68

R1

L1

µ

H

300

10

R4

85K

V

out2

C3
47nF

VF

V

CE(sat)

C2

100

+

µ

12

Ω

Prog.

Regulator

9

F

C7

0.22µF

8

7

R5

10k

A simplified method on “how to calculate the coil inductance”
is given below. The operation point at minimum supply
voltage (V
output voltage (V

) and max. output current (I

CC2

) determines the coil data. Figure 14

out2

) for a fixed

out2

shows the typical voltage and current waveforms on the coil
L1 (coil losses neglected).

Equations (1) and (2) yield the respective coil voltage
VL– and VL + (see Figure 14):

VL+ = V

VL– = V

[∆V

(Pin 9 – Pin 8)

out2

+ ∆V

CC2

(Pin 9 – Pin 8)

– V

CE

+ VF – V
– V

sat

CC2

12

: input/output voltage drop of the regulator,

(1)
(2)

2.5 V typical]
[VF, V

CE(sat)

, V

: see Electrical Characteristics Table]

12(H)

The time ratio α for the charging time to dumping time is
defined by Equation (3):

t

VL+

α =

1

=

t

VL–

2

(3)

Figure 14. V oltage and Current Waveform

on the Coil (not to scale)

Coil
Voltage

V

CC2

Coil
Current

I

Lpeak

t

t

1

2

+

L

V–

L

V

t

t

The coil charging time t1 is found using Equation (4):

(1 +

1

1

) ⋅ f

α

(4)

t1 =

[f : minimum oscillation frequency which should be chosen
above the audio frequency band (e.g. 20 kHz)]

Knowing the dc output current I
regulator, the peak coil current I

I

L(peak)

= 2 ⋅ (I

of the programmable

out2

can now be calculated:

L(peak)

) (1 + α)

out2

(5)

The coil inductance L1 of the nonsaturated coil is given by
Equation (6):

t

1

I

L(peak)

(VL–)

(6)L1 =

The formula (6a) yields the current sensing resistor R1 for a
defined peak coil current I

R1 =

L(peak)

V

12(H)

I

L(peak)

:

(6a)

In order to limit the by–pass current through capacitor C7
during the energy dumping phase the value C2>>C7 should
be implemented.

For all other operation conditions, the feedback signal from
the programmable voltage regulator controls the activity of
the converter.

MOTOROLA ANALOG IC DEVICE DATA

9

TCA5600 TCF5600

Programmable V oltage Regulator

This series voltage regulator is programmable by the
voltage divider R4, R5 for a nominal output voltage of 6.0 V ≤
V

≤ 30 V.

out2

(V

R4 =

out2

[R5 = 10 k, V

– V

ref nom

V

ref nom

ref nom

)

• R5

= 2.5 V]

(7)

Current limitation and thermal shutdown capability are
standard features of this regulator. The voltage drop
∆V

(Pin 9 – Pin 8)

across the series pass transistor generates
the feedback signal to control the dc/dc converter
(see Figure 13).

Control Inputs INH1, INH2

The dc/dc converter and/or the regulator V

are remote

out2

controllable through the TTL, MOS compatible inhibit inputs
INH1 and INH2 where the latter is a three–level detector
(Logic “0”, High Impedance “Z”, Logic “1”). Both inputs are
set–up to provide the following truth table:

Figure 15. INH1, INH2 TruthTable

Mode INH1 INH2 V

1 0 0 OFF INT
2 0 High “Z” V
3 0 1 V
4 1 0 OFF INT
5 1 High “Z” 5.0 V ON
6 1 1 5.0 V INT

INT: Intermittent operation of the converter means that the

converter operates only if V

ON: The converter loads the storage capacitor C2 to its full

charge (V9 = 33 V), allowing fast response time of the
regulator V

OFF: High impedance (internal resistor 10 k to ground)

when addressed by the control software.

out2

out2

out2
out2

CC2<Vout2

DC/DC

ON

INT

.

Microprocessor Supply Regulator

Together with an external PNP power transistor (Q1), a

5.0 V supply exhibiting low voltage drop is obtained to power
microprocessor systems and auxiliary circuits. Using a power
Darlington with adequate heat sink in the output stage boosts
the output current I

above 1.0 A.

out1

The current limitation circuit measures the emitter current

of Q1 by means of the sensing resistor, RSC:

V

RSC

I

E

(8)RSC =

[IE: emitter current of Q1]
[V

: threshold voltage

RSC

[V

: (see Electrical Characteristics Table)]

RSC

The voltage protection circuit performs a foldback
characteristic above a nominal operating voltage, V

CC2

≥

18 V.

Delay and Watchdog Circuit

The undervoltage monitor supervises the power supply

V

and releases the delay circuit RESET

out1

as soon as the
regulator output reaches the microprocessor operating a
range [e.g., V

low

w 0.93

• V

out1(nom)

]. The RESET output has
an open–collector and may be connected in a “wired–OR”
configuration.

The watchdog circuit consists of a retriggerable
monostable with a negative edge sensitive control input WDI.
The watchdog feature may be disabled by means of the
watchdog select input WDS
the Typical RESET

Timing Diagram.

driven to a “1”. Figure 17 displays

The commuted current source IC5 on Pin 17, threshold
voltage V
the RESET

C5(L)

, V

and an external capacitor C5 define

C5(H)

delay and the watchdog timing. The relationship

of the timing signals are indicated by the Equations (9) to (1 1).

Figure 16 represents a typical timing diagram for an E2PROM
programming sequence in a microprocessor based system.
The High “Z” state enables the dc/dc converter to ramp during
t3 to the voltage V9 at Pin 9 to a high level before the write
cycle takes place in the memory.

Figure 16. T ypical E2PROM Programming Sequence

(not to scale)

V9

– V

F

High “Z”

max

t3t

4

V9

int

Programming

Voltage VPP

t

V

CC2

V

out2

5.0V
INH1

“1”
”0”

INH2

“1”
“0”

V

9

delay: td =

Watchdog timeout:

Watchdog RESET:

[IC5, V

C5(H)

, V

C5(L)

C5

• V

C5(H)

|IC5|

twd =

tr =

C5 • (V

C5 • (V

C5(H)

50

C5(H)

5

• I

• |I

C5

C5

– V

– V

|

C5(L)

C5(L)

)

(10)

)

(11)

: see Electrical Characteristics Table]

(9)RESET

10

MOTOROLA ANALOG IC DEVICE DATA

V

CC2

TCA5600 TCF5600

Figure 17. T ypical RESET Timing Diagram (not to scale)

V

< V

CC2

out1

MR752

V

bat

R3

150

D1

Ω

V

out1

(a)

V

C5

RESET

V

C5

WDI
(b)
RESET

V

Ignition

Key

C1

µ

220

Z1
MR2525L

Overload

C5(N)

t

d

V

C5(L)

t

wd

V

t

r

Figure 18. T ypical Automative Application

100µF

R1

0.68

C2

Ω

300

F

+

µ

H

L1

V

D

10 9 8

0.22
C7

712

86k

µ

F

R5

10k

C5(H)

R4

+

47

nF

C3

V

out2

50mA

V

CC2

24V

14

R2

0.5

(a) Watchdog inhibited, WDS
(b) Watchdog operational, WDS

Ω

16

= “1”

= “0”

µ

µ

C6

0.33

P

C9

22nF

P

V

CC1

µ

F

INH

INH

RESET

µ

P

2

11

6

1

3

1

DC/DC

Converter

Reference

2.5V

Delay

Circuit

17 4 5 13

IC 5

C5
100nF

A2

Thermal

Shut–Down

Watchdog

18

WDS

µ

TCA5600

WDI

C8
330pF

P

Current

Limit

V

ref

A1

Protection

Gnd

Voltage

A1

15

2

Q1*

BD242SP

µ

150

V

out1

5.0V/300mA

F+

C4

MOTOROLA ANALOG IC DEVICE DATA

11

TCA5600 TCF5600

OUTLINE DIMENSIONS

PLASTIC PACKAGE

CASE 707–02

ISSUE C

18

10

B

1

9

A

C

K

N

F

D

H

G

SEATING
PLANE

L

M

J

NOTES:

1. POSITIONAL TOLERANCE OF LEADS (D),
SHALL BE WITHIN 0.25 (0.010) AT MAXIMUM
MATERIAL CONDITION, IN RELATION TO
SEATING PLANE AND EACH OTHER.

2. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.

3. DIMENSION B DOES NOT INCLUDE MOLD
FLASH.

DIM MIN MAX MIN MAX

A 22.22 23.24 0.875 0.915
B 6.10 6.60 0.240 0.260
C 3.56 4.57 0.140 0.180
D 0.36 0.56 0.014 0.022

F 1.27 1.78 0.050 0.070
G 2.54 BSC 0.100 BSC
H 1.02 1.52 0.040 0.060

J 0.20 0.30 0.008 0.012
K 2.92 3.43 0.115 0.135

L 7.62 BSC 0.300 BSC
M 0 15 0 15

__ __

N 0.51 1.02 0.020 0.040

INCHESMILLIMETERS

Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty , representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “T ypical” parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola
was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
Opportunity/Affirmative Action Employer.

How to reach us:

USA/EUROPE /Locations Not Listed: Motorola Literature Distribution; JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, 6F Seibu–Butsuryu–Center,

P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447 or 602–303–5454 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–81–3521–8315

MFAX: RMF [e-mail] – TOUCHT ONE 602–244–6609 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park,

INTERNET: http://Design–NET.com 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298

12

◊

MOTOROLA ANALOG IC DEVICE DATA

TCA5600/D

*TCA5600/D*