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TDA3663
Very low dropout voltage/quiescent current 3.3 V voltage regulator
General descriptionThe TDA3663 is a fixed 3.3 V voltage regulator with a very low dropout voltage and
quiescent current, which operates over a wide supply voltage range.
Features Fixed 3.3 V, 100 mA regulator Supply voltage range upto45V Very low quiescent current of 15 μA (typical value) Very low dropout voltage High ripple rejection Protections: Reverse polarity safe (down to −25 V without high reverse current) Negative transient of 50 V (RS =10 Ω, t< 100 ms) Able to withstand voltages up to 18 V at the output (supply line may be
short-circuited) ESD protection on all pins DC short-circuit safe to ground and VP of the regulator output Temperature protection (at Tj> 150 °C)
TDA3663
Very low dropout voltage/quiescent current 3.3 V voltage
regulator
Rev. 06 — 26 June 2007 Product data sheet
NXP Semiconductors TDA3663
Very low dropout voltage/quiescent current 3.3 V voltage regulator Quick reference data[1] The regulator output will follow VPifVP
Ordering information Block diagram
Table 1: Quick reference data= 14.4 V; Tamb =25 °C; measured with test circuit of Figure 15; unless otherwise specified.
Supply voltage: pinVP supply voltage regulator operating [1]3 14.4 45 V quiescent current VP= 4.5 V; IREG =0mA - 10 - μA= 14.4 V; IREG=0 mA - 15 30 μA≤VP≤22 V; IREG=10 mA - 0.2 0.5 mA≤VP≤22 V; IREG=50 mA - 1.4 2.5 mA
Regulator output: pin REG
VREG output voltage 8V≤VP≤22 V; IREG= 0.5 mA 3.16 3.3 3.44 V
0.5 mA≤ IREG≤ 100 mA 3.13 3.3 3.47 V≤VP≤45 V; IREG= 0.5 mA; 3.13 3.3 3.47 V
VREG(drop) dropout voltage VP= 3.1 V; Tamb≤85 °C;
IREG =50mA; 0.18 0.3 V
Table 2: Ordering information
TDA3663 SO4 plastic small outline package; 4 leads; body width 3.5 mm SOT223-1
TDA3663AT SO8 plastic small outline package; 8 leads; body width 3.9 mm SOT96-1
NXP Semiconductors TDA3663
Very low dropout voltage/quiescent current 3.3 V voltage regulator Pinning information
6.1 Pinning
NXP Semiconductors TDA3663
Very low dropout voltage/quiescent current 3.3 V voltage regulator
6.2 Pin description
[1] Forhe SO8 packageall GND pinsare connectedtothe lead frame and can alsobe usedto reducethe total
thermal resistance Rth(j-a) by soldering these pins to a ground plane. The ground plane on the top side of
the PCB acts like a heat spreader. Functional description
The TDA3663 is a fixed 3.3 V regulator which can deliver output currents up to 100 mA.
The regulator is available in SO8 and SO4 packages. The regulator is intended for
portable, mains and telephone applications. To increase the lifetime of batteries, a
specially built-in clamp circuit keeps the quiescent current of this regulator very low, also
in dropout and full load conditions.
The device remains operational downto very low supply voltages and below this voltageit
switches off.
A temperature protection circuit is included which switches off the regulator output at a
junction temperature above 150 °C. Limiting values
Table 3: Pin description 1 8 supply voltage
GND 2 and 4 2, 3, 6 and 8 ground[1]
REG 3 1 regulator output
n.c. - 4 and 5 not connected
Table 4: Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). supply voltage - 45 V
VP(rp) reverse polarity supply
voltage
non-operating - −25 V
Ptot total power dissipation
TDA3663 temperature of copper
area is25°C 4.1 W
TDA3663AT Tamb =25 °C- 5 W
Tstg storage temperature non-operating −55 +150 °C
Tamb ambient temperature operating −40 +125 °C junction temperature operating −40 +150 °C
NXP Semiconductors TDA3663
Very low dropout voltage/quiescent current 3.3 V voltage regulator Thermal characteristics
10. Characteristics
[1] The regulator output will follow VPifVP
Table 5: Thermal characteristics
Rth(j-a) thermal resistance from junction to ambient
SO4 in free air; soldered 100 K/W
SO8 in free air; soldered 155 K/W
Rth(j-c) thermal resistance from junction to case
SO4 to center pins; soldered 25 K/W
SO8 to center pins; soldered 30 K/W
Table 6: Characteristics= 14.4 V; Tamb =25 °C; measured with test circuit of Figure 15; unless otherwise specified.
Supply voltage: pinVP supply voltage regulator operating [1]3 14.4 45 V quiescent current VP= 4.5 V; IREG =0mA - 10 - μA= 14.4 V; IREG=0 mA - 15 30 μA≤VP≤22 V; IREG=10 mA - 0.2 0.5 mA≤VP≤22 V; IREG=50 mA - 1.4 2.5 mA
Regulator output: pin REG
VREG output voltage 8V≤VP≤22 V; IREG= 0.5 mA 3.16 3.3 3.44 V
0.5 mA≤ IREG≤ 100 mA 3.13 3.3 3.47 V≤VP≤45 V; IREG= 0.5 mA 3.13 3.3 3.47 V
VREG(drop) dropout voltage VP= 3.1 V; Tamb≤85 °C;
IREG =50mA 0.18 0.3 V
VREG(stab) output voltage long-term
stability
per 1000h - 20 - mV
ΔVREG(line) line input regulation
voltage≤VP≤22 V; IREG= 0.5 mA - 1 30 mV≤VP≤45 V; IREG= 0.5 mA - 1 50 mV
ΔVREG(load) load output regulation
voltage
0.5 mA≤ IREG≤50 mA - 10 50 mV
SVRR supply voltage ripple
rejection= 120 Hz;
Vi(ripple)=1V (RMS);
IREG= 0.5 mA 60 - dB
IREG(crl) output current limit VREG> 2.8V 0.17 0.25 - A
ILO(rp) output leakage current at
reverse polarity= −15 V; VREG≤ 0.3V - 1 500 μA
NXP Semiconductors TDA3663
Very low dropout voltage/quiescent current 3.3 V voltage regulator
11. Application information
11.1 Noise
The output noise is determined by the value of the output capacitor. The noise figure is
measured at a bandwidth of 10 Hzto 100 kHz (seeT able 7).
11.2 Stability
For stable operation: The maximum output capacitor ESR should not exceed22Ω (worst-case) andfor the
minimum ESR, see Table8. The ESR of the output capacitor is limited. See Table 8 for the minimum ESR values of the output capacitor, at Tamb given the
load and output capacitance.
Remark:In the eventof using different typesof capacitors,a minimum ESR needsto
be created by using an additional resistor that is placed is series with the output
capacitor, see Figure4. It is recommended not to use below 1 mA output current because of reduced phase
margin.
11.3 Application circuits
The maximum output current of the regulator equals:
When Tamb =21 °C and VP=14 V the maximum output current equals 116 mA.
The total thermal resistance of the TDA3663 can be decreased from 155 K/W to 30 K/W
for the SO8 version. For the SO4 version it can be decreased from 100 K/Wto25 K/W
when GND pins2 and 4 of the package are soldered to the printed-circuit board.
Table 7: Noise figures
0.5 550 320 300 650 400 400
Table 8: Minimum ESR values required0Ω > 1.5Ω > 2.5Ω >0Ω1Ω > 0.5Ω >1Ω >0Ω >0Ω > 0.5Ω >4Ω >0Ω
100 >0Ω > 0.5Ω >4Ω >0Ω REG max()
150 T amb–thja–() VP V REG– ()× ---------------------------------------------------------- 150 T amb–
100 VP 3.3– ()× ---------------------------------------- mA()==
NXP Semiconductors TDA3663
Very low dropout voltage/quiescent current 3.3 V voltage regulator
11.3.1 Application circuit with backup function
Sometimes a backup function is needed to supply, for example, a microcontroller for a
short period of time when the supply voltage spikes to 0 V (or even−1 V).
This function can easily be built with the TDA3663 by using an output capacitor with a
large value. When the supply voltage is 0 V (or−1 V), only a small current will flow into
pin REG from this output capacitor (a few μA).
The application circuit is given in Figure4.
NXP Semiconductors TDA3663
Very low dropout voltage/quiescent current 3.3 V voltage regulator
11.4 Additional application information
This section gives typical curves for various parameters measured on the TDA3663AT.
Standard test conditions are: VP= 14.4 V; Tamb =25 °C.
