TDA3681 Datasheet, PDF (17/28 Pages) NXP Semiconductors – Multiple voltage regulator with switch and ignition buffer

Philips Semiconductors
Multiple voltage regulator with switch and
ignition buffer
Product specification
TDA3681
SYMBOL
V_IL(clamp)
PARAMETER
LOW-level input
clamping voltage
CONDITIONS
MIN.
TYP.
−0.6 −
MAX.
0
UNIT
V
Ignition buffer
V_OL
LOW-level output voltage I_IGNOUT = 0 mA
0
0.2
0.8
V
V_OH
HIGH-level output
I_IGNOUT = 0 mA
voltage
4.5 5.0
5.25
V
I_OL
LOW-level output current V_IGNOUT ≤ 0.8 V
I_OH
HIGH-level output
V_IGNOUT ≥ 4.5 V
current
0.45 0.8
−
mA
−0.45 −2.0
−
mA
I_LO
output leakage current V_IGNOUT = 5 V; V_IGNIN = 0 V −
−
(source)
1.0
µA
t_PLH
LOW-to-HIGH
V_IGNIN rising from 1.7 to 2.5 V −
−
propagation time
500
µs
t_PHL
HIGH-to-LOW
V_IGNIN falling from 2.5 to 1.7 V −
−
propagation time
500
µs
Temperature protection
T_j(sd)
junction temperature for
shutdown
T_j(hold)
junction temperature for
hold trigger
150 160
170
°C
150 160
170
°C
Notes
1. Minimum operating voltage, only if V_P1 has exceeded 6.5 V.
2. The total quiescent current is measured in the standby mode. Therefore, the enable inputs of regulators 1, 3, 4 and
the power switch are grounded and R_L(REG2) = ∞ ; see Figs 10 and 11.
3. The voltage of the regulator drops as a result of a V_P1 drop for regulators 1 and 2. Regulators 3 and 4 drop as a result
of V_P2 drop.
4. The rise and fall times are measured with a 10 kΩ pull-up resistor and a 50 pF load capacitor.
5. The delay time depends on the value of the reset delay capacitor: t_d(RES) = _I--Cc---_h- × V_C(th) = C × (750 × 10³)[s]
6. The delay time depends on the value of the reset delay capacitor: t_d(SW) = _I--Cc---_h- × V_C(th) = C × (375 × 10³)[s]
7. The drop-out voltage of regulators 1 and 2 is measured between pins V_P1 and REGn. The drop-out voltage of
regulators 3 and 4 is measured between pins V_P2 and REGn.
8. At current limit, I_m(REGn) is held constant (see Fig.8).
9. The foldback current protection limits the dissipated power at short-circuit (see Fig.8).
10. The drop-out voltage is measured between pins BU and REG2.
11. The drop-out voltage of the power switch is measured between pins V_P1 and SW.
12. The maximum output current of the power switch is limited to 1.8 A when the supply voltage exceeds 18 V.
13. At short-circuit, I_sc(SW) of the power switch is held constant to a lower value than the continuous current after a delay
of at least 10 ms.
2002 Apr 10
17