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PDF APS8922A Data sheet ( Hoja de datos )
| Número de pieza | APS8922A | |
| Descripción | 6A DUAL LOAD SWITCH | |
| Fabricantes | Advanced Power Electronics | |
| Logotipo |  |
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Advanced Power
Electronics Corp.
APS8922A
ULTRA- LOW ON RESISTANCE, 6-A DUAL LOAD SWITCH
WITH CONTROLLED TURN-ON
FEATURES
▓ Integrated Dual Channel Load Switch
▓ Input Voltage Range: 0.8V to 5.5V
▓ Ultra-low ON-Resistance, RON = 20mΩ per
Channel
▓ 6A Maximum Continuous Current per Channel
▓ Low Threshold Control Input
▓ Adjustable Rise Time
▓ Quick Output Discharge Transistor
▓ RoHS Compliant and Halogen Free Product
APPLICATIONS
▓ Telecom Systems
▓ Industrial Systems
▓ Set-Top-Box
▓ Consumer Electronics
▓ Notebooks / Netbooks
DESCRIPTION
The APS8922A is a small, ultra-low RON dual load
switch with controlled turn on. It contains two
N-channel MOSFETs that can operate over an input
voltage range of 0.8V to 5.5V and support maximum
continuous current up to 6A each. Each load switch
is controlled by an on/off input (ON), which is
capable of interfacing directly with low-voltage
control signals.
Additional features include a 250Ω on-chip load
resistor for output quick discharge when switch is
turned off, in order to avoid inrush current, the rise
time is adjustable by an external ceramic capacitor
on the CTx pin.
The APS8922A is available in an ultra-small, space
.saving 3mmx2mm 14-pin DFN package with thermal
pad.
TYPICAL APPLICATION
+5V
VIN1
CIN1
1uF
VIN2
CIN2
1uF
ON1 VBIAS
VIN1
VOUT1
APS8922A
ON2
VOUT2
VIN2 CT1 CT2 GND
CT1
CT2
VOUT1
COUT1
0.1uF
VOUT2
COUT2
0.1uF
Data and specifications subject to change without notice
1
20160315V3
1 page  
Advanced Power
Electronics Corp.
APS8922A
PIN DESCRIPTIONS
PIN No.
1, 2
3
4
5
6,7
8,9
10
11
12
13,14
PIN SYMBOL
VIN1
ON1
VBIAS
ON2
VIN2
VOUT2
CT2
GND
CT1
VOUT1
PIN DESCRIPTION
Channel 1 input, bypass this input with a ceramic capacitor to ground.
Channel 1 enable control input, active high. Do not leave floating.
5V bias voltage.
Channel 2 enable control input, active high. Do not leave floating.
Channel 2 input, bypass this input with a ceramic capacitor to ground.
Channel 2 output.
A capacitor to ground set the rise time of VOUT2.
Ground.
A capacitor to ground set the rise time of VOUT1.
Channel 1 output.
BLOCK DIAGRAM
VBIAS
ON1
ON2
GND
Oscillator
Charge
Pump
.
Control
Logic
Output 1 Discharge
Output 2 Discharge
VIN1
VOUT1
VIN2
VOUT2
CT1 CT2
5
5 Page 
Advanced Power
Electronics Corp.
APS8922A
APPLICATION INFORMATION (Continued)
Input Capacitor
An input capacitor is recommended to be placed between VINx and GND to limit the voltage drop on the input
supply during high current application.
Output Capacitor
Setting a CIN greater than the COUT is highly recommended. Since the internal body diode is in the NMOS
switch, this prevents the current flows through the body diode from VOUTx to VINx when the system supply is
removed.
Layout Considerations
The Figure 22 shows the reference layout for APS8922A. Below lists help start layout.
1. The current loop of two load switch should be separated and symmetrized to each other.
2. Keep the high current paths (VIN, VOUT and GND; blue circle) wide and short to obtain the best effect.
3. The input and output capacitors should be close to the device as possible to minimize the parasitic trace
inductances.
4. Place the thermal vias under the exposed pad of the device (green circle). This help for thermal diffusion
away from the device.
.
Fig.22 APS8922A Reference Layout
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet APS8922A.PDF ] | |
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