TDA3609 datasheet(13/20 Pages) PHILIPS

13 / 20 page

1997 Aug 15

Philips Semiconductors

Preliminary speciﬁcation

Multiple voltage regulator with switch and

ignition buffers

TDA3609JR

Notes

1. Minimum operating voltage, only if VP has exceeded 6.5 V.

2. The quiescent current is measured in the standby mode. So, the enable inputs of regulator 1, 3 and the power switch

are grounded and RL(REG2) = ∞ (see Fig.7).

3. The voltage of the regulator sinks as a result of a VP drop.

4. The rise and fall time is measured with a 10 k

Ω pull-up resistor and a 50 pF load capacitor.

5. The delay time depends on the value of the capacitor:

6. The drop-out voltage of regulators 1, 2 and 3 is measured between VP and REGn.

7. At current limit, IREGmn is held constant (see Fig.5 for behaviour of IREGmn).

8. The foldback current protection limits the dissipated power at short-circuit (see Fig.5).

9. The peak current of 300 mA can only be applied for short periods (t < 100 ms).

10. The drop-out voltage measured between BU and REG2.

11. The drop-out voltage of the power switch is measured between VP and SW.

12. The maximum output current of the switch is limited to 1.8 A when the supply voltage exceeds 18 V.

A test-mode is built-in. The delay time of the switch will be disabled when a voltage of VP + 1 V is applied to the

switch-enable input.

13. At short-circuit, Isc of the power switch is held constant to a lower value than the continuous current after a delay of

at least 10 ms. A test-mode is built-in. The delay time of the switch will be disabled when a voltage of VP +1V is

applied to the switch-enable input.

14. VIGN1out = LOW for VIGN1out > 1.2 V or VEN1 > 1.3 V or VEN3 > 1.3 V or VENSW > 1.3 V.

Ignition 2 buffer

VOL

LOW-level output voltage

IIGN2out = 0 mA

0.2

0.8

VOH

HIGH-level output voltage

IIGN2out = 0 mA

4.5

5.0

5.25

IOL

LOW-level output current

VIGN2out ≤ 0.8 V

0.45

0.8

−

IOH

HIGH-level output current

VIGN2out ≥ 4.5 V

−0.45 −2.0

−

ILO

output leakage current

(source)

VIGN1out =5V; VIGN1in =0V −−

1.0

µA

tPLH

LOW-to-HIGH

propagation time

VIGN2in rising from

1.7 V to 2.5 V

−−

500

µs

tPHL

HIGH-to-LOW

propagation time

VIGN2in falling from

2.5 V to 1.7 V

−−

500

µs

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

------

C(th)

750





()

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