TDA3661AT datasheet(4/16 Pages) PHILIPS

4 / 16 page

9397 750 15049

Product data sheet

Rev. 05 — 28 June 2005

4 of 16

Philips Semiconductors

TDA3661

Very low dropout voltage/quiescent current voltage regulator

10. Characteristics

[1]

The output voltage can be calculated using the following formula:

where

and

[2]

The regulator output will follow VP if VP <VREG +VREG(drop)

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 Hz to 100 kHz; see Table 7.

Table 6:

Characteristics

VP = 14.4 V; Tamb =25 °C; k = 4.01929 [1]; measured with test circuit of Figure 15; unless otherwise speciﬁed.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Supply voltage: pin VP

supply voltage

regulator operating

[2] 3

14.4

quiescent supply current

VP = 4.5 V; IREG = 0 mA

µA

VP = 14.4 V; IREG = 0 mA

µA

≤ VP ≤ 24 V; IREG = 10 mA

0.2

0.5

≤ VP ≤ 24 V; IREG = 50 mA

1.4

2.5

Regulator output: pin REG

VREG

output voltage

8 V

≤ V

P ≤ 22 V; IREG = 0.5 mA

4.8

5.0

5.2

0.5 mA

≤ IREG ≤ 100 mA

4.75

5.0

5.25

≤ VP ≤ 45 V; IREG = 0.5 mA

4.75

5.0

5.25

VREG(drop)

dropout voltage

VP = 4.5 V; Tamb ≤ 85 °C;

IREG =50mA

0.18

0.3

VREG(stab)

output voltage long-term

stability

per 1000 h

VREG(adj)

output voltage adjustment

range

1.5

∆VREG(line)

line input regulation voltage 7 V

≤ VP ≤ 22 V; IREG = 0.5 mA

≤ VP ≤ 45 V; IREG = 0.5 mA

∆VREG(load)

load output regulation

voltage

0.5 mA

≤ IREG ≤ 50 mA

SVRR

supply voltage ripple

rejection

fi = 120 Hz; Vi(ripple) = 1 V (RMS);

IREG = 0.5 mA

Vref

reference voltage

VP = 14.4 V

1.181

1.244

1.306

IREG(crl)

output current limit

VREG > 4 V

0.17

0.3

ILO(rp)

output leakage current at

reverse polarity

VP = −15 V; VREG = ≤ 0.3 V

500

µA

REG

ref

--------------------

100 k

Ω

≤

Table 7:

Noise ﬁgures

Output current

IREG (mA)

Noise ﬁgure (

µV)

C2=10

µF

C2=47

µF

C2 = 100

µF

0.5

550

320

300

650

400

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