Siemens TLE4270S, TLE4270G, TLE4270D Datasheet

P-TO252-5-1 (D-PAK)

5-V Low-Drop Fixed Voltage Regulator

TLE 4270

	Features
	•	Output voltage tolerance ≤ ± 2 %
	• Low-drop voltage
	•	Integrated overtemperature protection
	•	Reverse polarity protection
	• Input voltage up to 42 V						P-TO220-5-11
	• Overvoltage protection up to 65 V (≤ 400 ms)						(P-TO220-5-1)
	• Short-circuit proof
	• Suitable for use in automotive electronics
	•	Wide temperature range
	•	Adjustable reset time
	•	ESD protection > 4000 V
	Type			Ordering Code		Package	P-TO220-5-12
	TLE 4270			Q67000-A9209-A903		P-TO220-5-11
							(P-TO220-5-2)
	TLE 4270		S	Q67000-A9243-A904		P-TO220-5-12
	TLE 4270		G	Q67006-A9201-A901		P-TO263-5-1
	▼ TLE 4270			Q67000-A9209-A801		P-TO220-5-1
	▼ TLE 4270		S	Q67000-A9243-A802		P-TO220-5-2
	▼ TLE 4270		G	Q67006-A9201-A802		P-TO220-5-8	P-TO263-5-1
	● TLE 4270 D			Q67006-A9360		P-TO252-5-1
							(P-TO220-5-8)
	▼ Not for new design				● New type

Functional Description

This device is a 5-V low-drop fixed-voltage regulator. The maximum input voltage is 42 V (65 V, ≤ 400 ms). Up to an input voltage of 26 V and for an output current

up to 550 mA it regulates the output voltage within a 2 % accuracy. The short circuit protection limits the

output current of more than 650 mA. The device incorporates overvoltage protection and temperature protection that disables the circuit at unpermissibly high temperatures.

Semiconductor Group

1

1998-11-01

TLE 4270

Pin Configuration

(top view)

P-TO220-5-11	P-TO220-5-12	P-TO263-5-1
(P-TO220-5-1)	(P-TO220-5-2)	(P-TO220-5-8)

1

5

RO D

ΙGND Q

AEP01923

1

5

Ι GND	Q
RO	D

AEP02172

1

5

RO D

ΙGND Q

AEP01922

P-TO252-5-1 (D-PAK)

	GND
1	5

Ι RO D Q

AEP02580

Figure 1

Pin Definitions and Functions

Pin	Symbol	Function
1	I	Input; block to ground directly on the IC with ceramic capacitor
2	RO	Reset Output; the open collector output is connected to the 5 V output
		via an integrated resistor of 30 kΩ.
3	GND	Ground; internally connected to heatsink.
4	D	Reset Delay; connect a capacitor to ground for delay time adjustment.
5	Q	5-V Output; block to ground with 22 µF capacitor, ESR < 3 Ω.
Semiconductor Group			2	1998-11-01

TLE 4270

Application Description

The IC regulates an input voltage in the range of 5.5 V < VI < 36 V to VQnom = 5.0 V. Up to 26 V it produces a regulated output current of more than 550 mA. Above 26 V the

save-operating-area protection allows operation up to 36 V with a regulated output current of more than 300 mA. Overvoltage protection limits operation at 42 V. The overvoltage protection hysteresis restores operation if the input voltage has dropped below 36 V. A reset signal is generated for an output voltage of VQ < 4.5 V. The delay for power-on reset can be set externally with a capacitor.

Design Notes for External Components

An input capacitor CI is necessary for compensation of line influences. The resonant circuit consisting of lead inductance and input capacitance can be damped by a resistor of approx. 1 Ω in series with CI. An output capacitor CQ is necessary for the stability of

the regulating circuit. Stability is guaranteed at values of CQ ≥ 22 µF and an ESR of

< 3 Ω.

Circuit Description

The control amplifier compares a reference voltage, which is kept highly accurate by resistance adjustment, to a voltage that is proportional to the output voltage and drives the base of a series transistor via a buffer. Saturation control as a function of the load current prevents any over-saturation of the power element.

If the output voltage decreases below 4.5 V, an external capacitor CD on pin 4 (D) will be discharged by the reset generator. If the voltage on this capacitor drops below VDRL, a reset signal is generated on pin 2 (RO), i.e. reset output is set low. If the output voltage rises above 4.5 V, CD will be charged with constant current. After the power-on-reset time the voltage on the capacitor reaches VDU and the reset output will be set high again. The value of the power-on-reset time can be set within a wide range depending of the capacitance of CD.

The IC also incorporates a number of internal circuits for protection against:

•Overload

•Overvoltage

•Overtemperature

•Reverse polarity

Semiconductor Group

3

1998-11-01

TLE 4270

		Temperature		Saturation
				Control and
		Sensor
				Protection
				Circuit
Input	1			5	Output
			Control
			Amplifier	2	Reset
		Bandgap	Buffer
	Adjustment		+	Reset	Output
		Reference
			-	Generator
				4	Reset
					Delay
			3
			GND		AEB01924

Figure 2

Block Diagram

Semiconductor Group

4

1998-11-01

TLE 4270

Absolute Maximum Ratings

Tj = – 40 to 150 °C

Parameter	Symbol		Limit Values		Unit	Notes
		min.		max.
Input
Voltage	VI	– 42		42	V	t ≤ 400 ms
Voltage	VI			65	V
Current	II					internally limited
Reset Output
Voltage	VR	– 0.3		7	V
Current	IR					Internally limited
Reset Delay
Voltage	VD	– 0.3		7	V
Current	ID					Internally limited
Output
Voltage	VQ	– 1.0		16	V
Current	IQ					Internally limited
Ground
Current	IGND	– 0.5		–	A	–
Temperatures
Junction temperature	Tj			150	°C	–
Storage temperature	Tstg	– 50		150	°C

Optimum reliability and life time are guaranteed if the junction temperature does not exceed 125 °C in operating mode. Operation at up to the maximum junction temperature of 150 °C is possible in principle. Note, however, that operation at the maximum permitted ratings could affect the reliability of the device.

Semiconductor Group

5

1998-11-01

TLE 4270

Operating Range

Parameter

Symbol

Limit Values

Unit

Notes

min.

max.

Input voltage

VI

6

42

V

–

Junction temperature

Tj

– 40

150

°C

–

Thermal Resistance

Junction ambient

Rthja

–

65

K/W

TO263, TO2521)

70

K/W

Junction case

Rthjc

–

3

K/W

t < 1 ms

Zthjc

2

K/W

(TO-220/263

Packages)

1) Soldered in, min. footprint

Characteristics

VI = 13.5 V; – 40 °C ≤ Tj = ≤ 125 °C (unless otherwise specified)

Parameter

Symbol

Limit Values

Unit

Test Condition

min.

typ.

max.

Output voltage

VQ

4.90

5.00

5.10

V

5 mA ≤ IQ ≤ 550 mA;

6 V ≤ VI ≤ 26 V

Output voltage

VQ

4.90

5.00

5.10

V

26 V ≤ VI ≤ 36 V;

IQ ≤ 300 mA

Output current

IQmax

650

850

–

mA

VQ = 0 V

limiting

Current

Iq

–

1

1.5

mA

IQ = 5 mA

consumption

Iq = II − IQ

Current

Iq

–

55

75

mA

IQ = 550 mA

consumption

Iq = II – IQ

Current

Iq

–

70

90

mA

IQ = 550 mA; VI = 5 V

consumption

Iq = II – IQ

Drop voltage

V

–

350

700

mV

I = 550 mA1)

dr

Q

Semiconductor Group

6

1998-11-01