APL5910 Ver la hoja de datos (PDF) - Anpec Electronics
Número de pieza
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Fabricante
APL5910 Datasheet PDF : 17 Pages
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APL5910
Operating Waveforms (Cont.)
Refer to the typical application circuit. The test condition is VIN=1.5V, VCNTL=5V, VOUT=1.2V, TA= 25oC unless otherwise specified.
Shutdown
Enable
VEN
1
VOUT
2
VPOK
3
IOUT
4
COUT=10µF, CIN=10µF, RL=1.2Ω
CH1: VEN, 5V/Div, DC
CH2: VOUT, 1V/Div, DC
CH3: VPOK, 5V/Div, DC
CH4: IOUT, 1.0A/Div, DC
TIME: 10µs/Div
VEN
1
VOUT
2
VPOK
3
IOUT
4
COUT=10µF, CIN=10µF, RL=1.2Ω
CH1: VEN, 5V/Div, DC
CH2: VOUT, 1V/Div, DC
CH3: VPOK, 5V/Div, DC
CH4: IOUT, 1.0A/Div, DC
TIME: 0.5ms/Div
Pin Description
PIN
NO.
NAME
1
POK
2
EN
3
VIN
4
VCNTL
5
NC
6
VOUT
7
8
Exposed Pad
FB
GND
-
FUNCTION
Power-OK signal output pin. This pin is an open-drain output used to indicate the status of output
voltage by sensing FB voltage. This pin is pulled low when output voltage is not within the
Power-OK voltage window.
Active-high enable control pin. Applying and holding the voltage on this pin below the enable
voltage threshold shuts down the output. When re-enabled, the IC undergoes a new soft-start
process. When left this pin open, an internal pull-up current (5µA typical) pulls the EN voltage and
enables the regulator.
Main supply input pin for voltage conversions. A decoupling capacitor (≥10µF recommended) is
usually connected near this pin to filter the voltage noise and improve transient response. The
voltage on this pin is monitored for Power-On-Reset purpose
Bias voltage input pin for internal control circuitry. Connect this pin to a voltage source (+5V
recommended). A decoupling capacitor (1µF typical) is usually connected near this pin to filter
the voltage noise. The voltage at this pin is monitored for Power-On-Reset purpose.
No Connection.
Output pin of the regulator. Connecting this pin to load and output capacitors (10µF at least) is
required for stability and improving transient response. The output voltage is programmed by the
resistor-divider connected to FB pin. The VOUT can provide 1A (max.) load current to loads.
During shutdown, the output voltage is quickly discharged by an internal pull-low MOSFET.
Voltage Feedback Pin. Connecting this pin to an external resistor divider receives the feedback
voltage of the regulator.
Ground pin of the circuitry. All voltage levels are measured with respect to this pin.
P-Type Substrate connection of the chip. Connect this pad to system ground plane for good
thermal conductivity.
Copyright © ANPEC Electronics Corp.
8
Rev. A.3 - Jun., 2009
www.anpec.com.tw
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