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參數(shù)資料
| 型號(hào)： | TA8044AF |
| 廠商： | Toshiba Corporation |
| 英文描述： | ECONOLINE: RB & RA - Dual Output from a Single Input Rail- Power Sharing on Output- Industry Standard Pinout- 1kVDC & 2kVDC Isolation- Custom Solutions Available- UL94V-0 Package Material- Efficiency to 85% |
| 中文描述： | 3.3 / 5V的雙電壓調(diào)節(jié)器，帶有看門狗定時(shí)器 |
| 文件頁數(shù)： | 3/10頁 |
| 文件大?。?/td> | 199K |
| 代理商： | TA8044AF |
TA8044AF
2002-02-27
3
PIN DESCRIPTION
PIN No.
SYMBOL
DESCRIPTION
1
V
IN1
Power supply input pin for V
CC1
. It contains a 150mA (Typ.) current limiter.
2
V
S1
Current limiter pin for V
CC1
. A 120m
sense resistor is included between pin 1 and this pin.
3
OUT1
Power supply input pin for V
CC1
. When using an external current boost transistor, connect the
base of a PNP transistor to this pin. No external transistor is required when using the IC at a
load current of 10mA or less. In this case, connect the power supplies by shorting pins 1, 2, and
3.
4
V
CC1
Voltage detection / output pin for V
CC1
. When using a current boost transistor, connect the
collector of a PNP transistor to this pin. When used with a load current of 10mA or less, this pin
serves as an output pin for the 3.3V power supply.
5
COMP1
Phase compensating pin for V
CC
1. Connect a phase compensating capacitor between pin 4 and
this pin.
6
EN
On / off control pin for V
CC2
. The 5V output is turned on when EN is high and turned off when
EN is low. A 50k
pull-down resistor is included in GND.
7
GND
Grounded
8
RESET
Power-on reset / watchdog timer reset output pin.
Generates a reset signal that is determined by C
T
and R
T
at the TC pin.
If no clock is fed to the CK input, this pin generates a reset pulse intermittently.
This is an NPN transistor collector output, with a 100k
pull-up resistor built into V
CC2
.
9
TC
Time setup pin for the reset and watchdog timers. Connect resistor RT to V
CC2
and capacitor
C
T
to GND.
10
CK
Clock input pin for the watchdog timer. If used only as a power-on reset timer, pull up this input
to V
CC2
.
11
V
CC3
This pin contains a 7.5V Zener diode. To use this pin, short it to pin 13. When the V
CC2
voltage
becomes abnormal, the Zener diode suppresses the voltage.
12
COMP2
Phase compensating pin for V
CC2
. Connect a phase compensating capacitor between pin 13
and this pin.
13
V
CC2
Voltage detection pin for the 5V constant-voltage power supply, V
CC2
. It also supplies power to
the reset timer block.
14
OUT2
This pin is used to connect the base of an external PNP transistor. The output voltage is
controlled by an internal op-amp to maintain it stably at 5V. Since the recommended current of
I
OUT
is 5mA, an output current of up to 600mA can be flowed if HFE of the external transistor is
120 or more.
15
V
S2
Detection pin for the V
CC2
current limiter. A voltage drop occurring in the external resistor Rs
between pins 15 and 16 is monitored. The current limiter is actuated when the voltage drop
exceeds 0.3V.
Ex. ) When the current limiter need to be actuated at a load current of 600mA
Rs = 0.3V / 600mA = 0.5
16
V
IN2
Power supply input pin.
An internal 6V constant voltage is connected to this pin for supplying power to the V
CC1 / 2
current limiters, voltage regulating circuit for V
CC1
, reference voltage source, and the EN input
circuit.
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