|
|
PDF AAT2786 Data sheet ( Hoja de datos )
| Número de pieza | AAT2786 | |
| Descripción | 1.5A Step-Down Converter and 150mA LDO | |
| Fabricantes | Advanced Analogic Technologies | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AAT2786 (archivo pdf) en la parte inferior de esta página. Total 27 Páginas | ||
|
No Preview Available !
SystemPowerTM
PRODUCT DATASHEET
AAT2786
1.5A Step-Down Converter and 150mA LDO
General Description
The AAT2786 is a dual output power solution. It includes
a 1.5A, 1.4MHz, high-efficiency step-down converter and
a high performance 150mA LDO regulator. The step-
down regulator output voltage is adjustable from 0.6V to
VIN. The LDO regulator has a factory preset fixed output
voltage from 1.2V to 3.3V.
The step-down converter consumes only 42µA of no-load
quiescent current and is designed to maintain high effi-
ciency throughout the load range. The step-down con-
verter has ultra-low RDS(ON) integrated MOSFETs and can
operate up to 100% duty cycle to enable high output
voltage, high current applications which require a low
dropout threshold. The AAT2786 provides excellent tran-
sient response and high output accuracy across the
operating range. Pulling the MODE/SYNC pin high
enables “PWM Only” mode, maintaining constant fre-
quency and low output ripple across the operating range.
Alternatively, the converter may be synchronized to an
external clock input via the MODE/SYNC pin.
The MicroPower low dropout linear regulator in the
AAT2786 has been specifically designed for high-speed
turn-on and turn-off performance, fast transient response,
and good noise and power supply ripple rejection (PSRR),
making it ideal for powering sensitive circuits with fast
switching requirements.
Over-temperature and short-circuit protection safeguard
the AAT2786 and system components from damage.
Features
• VIN Range : 2.5V to 5.5V
• 1.5A Step-Down Converter
▪ VOUT Range: 0.6V to VIN
▪ 95% Peak Efficiency
▪ High Efficiency across load range
▪ 42µA No Load Quiescent Current
▪ Optional “PWM Only” Low Noise Mode
▪ Current limit and soft start
• 150mA LDO Regulator
▪ VOUT Range: 1.2V to 3.3V (Fixed)
▪ High Power Supply Rejection Ratio
▪ Low Output Noise
• Independent Enable Pins
• Integrated Power MOSFETs
• Over-Temperature Protection
• TDFN34-16 Package
• -40°C to +85°C Temperature Range
Applications
• Cellular and Smart Phones
• PDAs, Palmtops
• Digital Still and Video Cameras
• Portable Instruments
• Battery-Powered Applications
Typical Application
BUCK IN
C1
opt
R1
100
C2
10µF
C3
1µF
U1 L1
16 VP
15 VP
LX 1
3.3µH
LX 2
R2
Adj
12 VIN
FB 5
ON/OFF
ON/OFF
AAT2786IRN
13 BUCK_EN
GND
14 MODE/SYNC
4
R3
59k
LDO IN
11 LDOIN LDO_OUT 6
ON/OFF
C6
1µF
9 LDO_EN
8 BYP
PGND 3
C8
10nF 10 N/C
LDO_GND 7
BUCK OUT
C5
Opt C4
22µF
LDO OUT
C7
2.2µF
2786.2008.04.1.0
www.analogictech.com
1
1 page  
SystemPowerTM
PRODUCT DATASHEET
AAT2786
1.5A Step-Down Converter and 150mA LDO
Electrical Characteristics (continued)
VLDOIN = VOUT(NOM) + 1V for VOUT options greater than 1.5V. VIN = 2.5 for VOUT ≤1.5V. IOUT = 1mA, COUT = 2.2µF, CIN = 1µF,
TA = -40°C to +85°C, unless otherwise noted. Typical values are TA = 25°C.
Symbol Description
LDO Regulator
VLDOOUT
Output Voltage Tolerance
ILDOOUT
VDO
ISC
IQ
ISD
ΔVOUT/
VOUT*ΔVIN
ΔVOUT(line)
ΔVOUT(load)
Output Current
Dropout Voltage2, 3
Short-Circuit Current
Ground Current
Shutdown Current
Line Regulation
Dynamic Line Regulation
Dynamic Load Regulation
PSRR
Power Supply Rejection Ratio
eN
TSD
THYS
TC
Enable
VIL
VIH
IEN_BUCK
IEN_LDO
tENDLY
Output Noise
Over-Temperature Shutdown Threshold
Over-Temperature Shutdown Hysteresis
Output Voltage Temperature Coefficient
Enable Threshold Low
Enable Threshold High
Enable Leakage Current
Enable Leakage Current
Enable Delay Time
Conditions
ILDOOUT = 1mA
to 150mA
TA = 25°C
TA = -40°C to 85°C
VLDOOUT > 1.2V
ILDOOUT = 150mA
VLDOOUT < 0.4V
VIN = 5V, No Load, EN = VIN
VIN = 5V, EN = 0V
VIN = VOUT + 1 to 5.0V
VIN = VLDOOUT + 1V to VLDOOUT + 2V,
ILDOOUT = 150mA, TR/TF = 2µs
ILDOOUT = 1mA to 150mA, TR < 5µs
ILDOOUT = 10mA,
CBYP = 10nF
1 kHz
10kHz
1MHz
Noise Power BW = 300Hz - 50kHz
VEN_BUCK = 5V
VEN_LDO = 5V
BYP = Open
Min
-1.5
-2.5
150
1.4
Typ Max
1.5
2.5
200 300
600
70 125
1
0.09
2.5
30
67
47
45
50
145
12
22
0.6
1
1.0
15
Units
%
mA
mV
mA
µA
µA
%/V
mV
mV
dB
µVrms
°C
°C
ppm/°C
V
V
µA
µA
µs
1. VDO is defined as VLDOIN - VLDOOUT when VLDOOUT is 98% of nominal.
2. For VLDOOUT < 2.3V, VDO = 2.5V - VLDOOUT.
2786.2008.04.1.0
www.analogictech.com
5
5 Page 
SystemPowerTM
Typical Characteristics–LDO
Dropout Voltage vs. Temperature
260
240
220 IL = 150mA
200
180
160
140 IL = 100mA
120
100
80
60
40 IL = 50mA
20
0
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120
Temperature (°C)
PRODUCT DATASHEET
AAT2786
1.5A Step-Down Converter and 150mA LDO
Dropout Characteristics
3.20
3.00
IOUT = 0mA
2.80
2.60 IOUT = 10mA
IOUT = 50mA
2.40 IOUT = 100mA
2.20 IOUT = 150mA
2.00
2.70
2.80 2.90 3.00 3.10
Input Voltage (V)
3.20
Dropout Voltage vs. Output Current
300
250
200
150
100
50
0
0
85°C
-40°C
25°C
25 50 75 100 125 150
Output Current (mA)
Ground Current vs. Input Voltage
90.00
80.00
70.00
60.00
50.00
40.00
30.00
IOUT = 0mA
IOUT = 150mA
IOUT = 50mA
20.00
10.00
IOUT = 10mA
0.00
2 2.5 3 3.5 4
Input Voltage (V)
4.5
Quiescent Current vs. Temperature
100
90
80
70
60
50
40
30
20
10
0
-40 -30 -20 -10 0
10 20 30 40 50 60 70 80 90 100 110 120
Temperature (°C)
Output Voltage vs. Temperature
1.203
1.202
1.201
1.200
1.199
1.198
1.197
1.196
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100
Temperature (°C)
2786.2008.04.1.0
www.analogictech.com
11
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet AAT2786.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AAT2782 | Triple Output PMIC | Advanced Analogic Technologies |
| AAT2782 | Triple-Output PMIC |  Skyworks |
| AAT2783 | Triple-Output PMIC | Skyworks |
| AAT2783 | Triple Output PMIC | Advanced Analogic Technologies |
| 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 |