參數(shù)資料
型號: TDA3661T
廠商: NXP SEMICONDUCTORS
元件分類: 基準電壓源/電流源
英文描述: Very low dropout voltage/quiescent current adjustable voltage regulator
中文描述: 1.5 V-33 V ADJUSTABLE POSITIVE LDO REGULATOR, 0.3 V DROPOUT, PDSO8
封裝: 3.90 MM, PLASTIC, SOT-96, SO-8
文件頁數(shù): 3/16頁
文件大?。?/td> 88K
代理商: TDA3661T
9397 750 15049
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 05 — 28 June 2005
3 of 16
Philips Semiconductors
TDA3661
Very low dropout voltage/quiescent current voltage regulator
6.2 Pin description
[1]
All GND pins are connected to the lead frame and can also be used to reduce the total thermal resistance
R
th(j-a)
by soldering these pins to a ground plane. The ground plane on the top side of the printed-circuit
board acts like a heat spreader.
7.
Functional description
The TDA3661 is an adjustable voltage regulator with an output voltage that can be fixed
by means of an external resistor divider. The regulator can deliver output currents up to
100 mA. The regulator is available in an SO8 package. 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, in
dropout and full load conditions.
The device remains operational down to very low supply voltages (typical 2 V) and below
this voltage it switches off. A temperature protection is included which switches off the
regulator output at a junction temperature above 150
°
C.
8.
Limiting values
9.
Thermal characteristics
Table 3:
Symbol
REG
GND
n.c.
ADJ
V
P
Pin description
Pin
1
2, 3, 6 and 7
4
5
8
Description
regulator output
ground
[1]
not connected
feedback input
supply voltage
Table 4:
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
Parameter
V
P
supply voltage
V
P(rp)
reverse polarity supply
voltage
P
tot
total power dissipation
Limiting values
Conditions
Min
-
-
Max
45
25
Unit
V
V
non-operating
temperature of
copper area is
25
°
C
non-operating
operating
operating
-
4.1
W
T
stg
T
amb
T
j
storage temperature
ambient temperature
junction temperature
55
40
40
+150
+125
+150
°
C
°
C
°
C
Table 5:
Symbol
R
th(j-c)
R
th(j-a)
Thermal characteristics
Parameter
thermal resistance from junction to case
thermal resistance from junction to ambient
Conditions
to center pins; soldered
in free air; soldered
Typ
30
155
Unit
K/W
K/W
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