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AN8018SA Datasheet(Fiches technique) 8 Page - Panasonic Semiconductor

Numéro de pièce AN8018SA
Description  1.8-volt 2-channel step-up, step-down, or inverting DC-DC converter control IC
Télécharger  26 Pages
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Fabricant  PANASONIC [Panasonic Semiconductor]
Site Internet  http://www.panasonic.com/industrial/
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AN8018SA Datasheet(HTML) 8 Page - Panasonic Semiconductor

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8
AN8018SA
Voltage Regulators
Pin No.
Equivalent circuit
Description
I/O
12
DT2:
I
The pin for setting channel 2 output maximum
duty ratio.
If this terminal is set at a voltage of 0.9 V or more,
FB2 terminal becomes high-level voltage and the
protective function for channel 2 output short-
circuit will stop (Unlatch function).
13
FB2:
O
The output pin for error amplifier 2 block.
The source current is
−47 µA and the sink current
is 47
µA.
Correct the frequency characteristics of the gain
and the phase by connecting a resistor and a ca-
pacitor between this terminal and GND.
14
IN
+2:
I
The noninverting input pin for error amplifier 2
block.
15
Off:
I
The terminal for on/off control.
High-level input: Normal operation (VOFF > 1.3
V)
Low-level input: Standby state (VOFF < 0.8 V)
The total current consumption in the standby state
can be suppressed to a value 1 mA or less.
16
VREF:O
The output terminal for the internal reference
voltage.
The reference voltage is 1.19 V (allowance:
±2%) at
VCC = 2.4 V and IREF = − 0.1 mA.
Connect a capacitor of 0.01
µF or more between
VREF and GND for phase compensation.
VCC
IN
+2
13
1.19 V
47
µA
OSC
PWM
47
µA
100
VCC
1.19 V
14
30 k
Internal circuit
start/stop
60 k
15
VCC
16
s Terminal Equivalent Circuits (continued)
VCC
FB2
12
0.9 V
OSC
PWM
0.9 V


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