|
|
PDF AS1382 Data sheet ( Hoja de datos )
| Número de pieza | AS1382 | |
| Descripción | DC-DC Step Down Converter | |
| Fabricantes | ams | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AS1382 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
|
No Preview Available !
AS1382
1A, High Efficiency, DC-DC Step Down
Converter
General Description
The AS1382 is a high-efficiency, constant-frequency
synchronous buck converter available in adjustabe- and
fixed-voltage versions. The wide input voltage range (2.7V to
5.5V), automatic powersave mode and minimal external
component requirements make the AS1382 perfect for any
single Li-Ion battery-powered application.
Typical supply current with no load is 95μA and decreases to
0.04μA in shutdown mode.
An internal synchronous switch increases efficiency and
eliminates the need for an external Schottky diode. The
internally fixed switching frequency (2MHz, 3MHz or 4MHz)
allows the usage of small surface mount external components.
Very low output voltages can be delivered with the internal
0.58V feedback reference voltage.
The AS1382 is available in a 6-pin WL-CSP package.
Ordering Information and Content Guide appear at end of
datasheet.
Figure 1:
Added Value of Using AS1382
Key Benefits & Features
The benefits and features of this device are listed below:
Benefits
Features
Ideal for single Li-Ion battery powered applications
Extended battery life
Supports a variety of end applications
Over – temperature protection and shutdown
Cost effective, small package
• Wide input voltage range (2.7V to 5.5V)
• High efficiency up to 96%
• Output voltage range (0.58V to 3.35V)
• Output current of 1A
• Switching frequency: 2MHz, 3MHz, 4MHz
• High efficiency/low noise operation
• Integrated temperature monitoring
• WL-CSP6 with 0.4mm pitch
ams Datasheet
[v1-04] 2015-Jun-19
Applications
The device is ideal for mobile communication devices, laptops
and PDAs, ultra-low-power systems, medical instruments, or
any other space-limited application with low
power-consumption requirements.
Page 1
Document Feedback
1 page  
AS1382 − Electrical Characteristics
Electrical Characteristics
Figure 6:
Electrical Characteristics
All limits are guaranteed. The parameters with min and max
values are guaranteed with production tests or SQC (Statistical
Quality Control) methods.
Symbol
Parameter
Note
Min Typ Max Unit
VIN Input Voltage
ISUP_DCDC Current Consumption
IFB Feedback Current
VFB Feedback Voltage
VOUT Regulated Output Voltage
Pin VIN
Operating Current
without Load
Shutdown Current
TAMB = 25°C
ADJ variant
Fixed VOUT variant
ADJ variant
2.7 5.5
95
0.04
1 30
0.56 0.58 0.60
0.6125
3.35
0.58 3.35
V
uA
nA
V
V
V
VOUT_TOL Output Voltage Tolerance
Fixed output variants,
min. 40mV
ηEFF Efficiency
see figures below
LNR Output Voltage Line Regulation Vin = 2.7V to 5.5V
LDR Output Voltage Load Regulation IOUT = 0 to 100mA
ILIMIT
Peak Coil Current
IOUT = 1A
ILOAD Load Current
VOUT ≤ 1.8V
VOUT > 1.8V
IT_COMP
Min load to guarantee correct
output voltage in high temp
RPMOS P-Channel FET RDS(ON)
ILSW = 100mA
RNMOS N-Channel FET RDS(ON)
ILSW = -100mA
VIH
Logic in threshold
VIL
pin EN, MODE
Variant A
fSW Switching Frequency
Variant B
Variant C
TSHDN Thermal Shutdown
ΔTSHDN Thermal Shutdown Hysteresis
-3
0
0
1.2
3%
96 %
0.1 %/V
0.02 %/mA
1.5 A
1A
0.7 A
20 uA
0.25 0.55
Ω
0.25 0.55
Ω
V
0.4 V
4 MHz
3 MHz
2 MHz
160 °C
25 °C
ams Datasheet
[v1-04] 2015-Jun-19
Page 5
Document Feedback
5 Page 
AS1382 − Application Information
Ceramic Input and Output Capacitors
When choosing ceramic capacitors for CIN and COUT, the X5R or
X7R dielectric formulations are recommended. These
dielectrics have the best temperature and voltage
characteristics for a given value and size. Y5V and Z5U dielectric
capacitors, aside from their wide variation in capacitance over
temperature, become resistive at high frequencies and
therefore should not be used.
Figure 14:
Recommended Input and Output Capacitors
Part Number
GRM21BR61E475KA12L
GRM219R60J106KE19D
C
4.7uF
10uF
TC
Code
X5R
X5R
Voltage
Rating
25V
6.3V
Dimensions
(L/W/H)
Manufacturer
0805
0805
www.murata.com
www.murata.com
Figure 15:
Adjustable Variant
Because ceramic capacitors lose a lot of their initial capacitance
at their maximum rated voltage, it is recommended that either
a higher input capacity or a capacitance with a higher rated
voltage is used.
Feedback Resistor Selection
In the AS1382-AD, the output voltage is set by an external
resistor divider connected to FB. This circuitry allows for remote
voltage sensing and adjustment.
AS1382-AD
1uH
SW
FB
GND
0.58V ≤ VOUT ≤ 3.35V
R1
COUT
R2 10uF
AS1382-AD: Shows the application diagram for the adjustable output version with the external resistor divider
ams Datasheet
[v1-04] 2015-Jun-19
Page 11
Document Feedback
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet AS1382.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AS1380 | AC-DC PWM |  ASI |
| AS1382 | DC-DC Step Down Converter | ams |
| AS1383 | DC-DC Step-Up Converter | ams |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |