|
|
PDF MIC2807 Data sheet ( Hoja de datos )
| Número de pieza | MIC2807 | |
| Descripción | RF PA Power Management IC | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de MIC2807 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
|
No Preview Available !
MIC2807
RF PA Power Management IC
2MHz, 600mA DC/DC w/DAC Input and
Bypass Switch, Dual Low Noise
200mA/30mA LDO Regulators
General Description
The MIC2807 integrates a high performance 600mA
DC/DC converter intended for powering a power amplifier
(PA) in a mobile phone with dual low noise low dropout
(LDO) regulators for the rest of the RF section. Optimized
for low noise performance, the MIC2807 improves
efficiency in the handset without compromising quality.
The MIC2807 has a 2MHz, constant frequency pulse width
modulated (PWM) DC/DC converter designed for low
noise operation and high efficiency. The output voltage
(VOUT) is variable from 0.3V to the input voltage (VIN),
adjustable from 0.3V to 3.6V through a DAC input when
VIN > VOUT. The converter will work in a 100% duty cycle
mode to offer maximum power and efficiency in the
application. In addition to 100% duty cycle, the DC/DC
converter has a bypass mode of operation where the input
voltage node (PVIN pin) is shorted to the output voltage
node (OUT pin) through a 95mΩ switch.
The integrated dual low noise low dropout regulators are
optimized for high PSRR capability and fast turn-on times.
The constant frequency DC/DC converter along with dual
low noise LDO regulators enables a very quiet and
efficient solution for mobile applications.
The MIC2807 is a µCap design, operating with small
ceramic output capacitors and inductors for stability,
reducing required board space and component cost and it
is available in the tiny 2.5mm x 2.8mm MLF® package.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
• 2.7V to 5.5V input voltage range
• Stable with ceramic output capacitors
• Tiny 17-pin 2.5mm x 2.8mm MLF® Package
• Thermal shutdown protection
• Current limit protection
RF PA Power Supply DC/DC Converter
• Adjustable output power supply – DAC controlled
– VOUT = VDAC x 3
• Bypass mode operation
– Internal 95mΩ switch between PVIN and OUT pins
– VDAC > 1.2V
• Up to 600mA output current in PWM mode
• 100% duty cycle operation for maximum efficiency
• Tiny 4.7µH, 1µF output inductor and capacitor
• Low-noise 2MHz PWM operation
• >90% efficiency
Dual Low Noise Low Dropout Regulators
• High accuracy – ±2% over temperature
• High PSRR – greater than 70dB
• Very low output noise – 32µVrms
• LDO1 – 200mA output current capability
• LDO2 – 30mA output current capability
Applications
• CDMA2000 mobile phones
• UMTS/WCDMA mobile phones
• Wibro modules
• WiFi modules
• Power amplifier modules (PAMs) with linear PAs
Typical Application
CDMA2000/WCDMA RF Power Supply Circuit
DC/DC Output Voltage
vs. DAC Voltage
4.5
4.0
VIN = 4.2V
IOUT = 100mA
3.5
3.0
2.5
2.0
1.5
1.0
0.5
00.1 0.3 0.5 0.7 0.9 1.1 1.3 1.5
DAC VOLTAGE (V)
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
February 2008
M9999-022008-B
1 page  
Micrel, Inc.
Parameter
Turn-On Time
DAC Input Current
Output Voltage/
DAC Voltage
Bypass Switch
Threshold
Bypass Switch
Hysteresis
Bypass Transition Time
Bypass Switch
On-Resistance
Bypass Switch Leakage
Bypass Over-Current
Limit
Current Limit Retry Time
Current Limit Retry
Duty Cycle
LDO1/LDO2 [VEN = 0V]
Total Ground Current(8)
Turn-on Time
LDO1 [VEN = 0V]
Output Voltage Accuracy
Line Regulation
Load Regulation(6)
Dropout Voltage(7)
Ground Pin Current(8)
Ripple Rejection
Current Limit
Output Voltage Noise
LDO2 [VEN = 0V]
Output Voltage Accuracy
Line Regulation
Load Regulation(6)
Dropout Voltage(7)
Ground Pin Current(8)
Ripple Rejection
Current Limit
Output Voltage Noise
Condition
IOUT = 100µA
(internally set)
DAC Voltage required to enable bypass mode
Delay from VDAC = 1.3V to VOUT = 0.90VIN
VIN = 3.0V, IBYPASS = 100mA
VEN1 = VEN2 = 3.6V
LDO1 or LDO2; CBYP = 0.1µF
Variation from nominal VOUT
–40°C to +125°C
VIN = VOUT +1V to 5.5V
IOUT = 100µA to 200mA
IOUT = 50mA; VOUT > 2.8V
IOUT = 150mA; VOUT > 2.8V
IOUT = 200mA; VOUT > 2.8V
IOUT = 0mA; EN2 = GND
f = up to 1kHz; CBYP = 0.1µF
f = 1kHz – 20kHz; CBYP = 0.1µF
VOUT = 0V
CBYP=0.1µF, 10Hz to 100kHz
Variation from nominal VOUT
–40°C to +125°C
VIN = VOUT +1V to 5.5V
IOUT = 100µA to 30mA
IOUT = 10mA; VOUT > 2.8V
IOUT = 30mA; VOUT > 2.8V
IOUT = 0mA; EN1 = GND
f = up to 1kHz; CBYP = 0.1µF
f = 1kHz – 20kHz; CBYP = 0.1µF
VOUT = 0V
CBYP = 0.1µF, 10Hz to 100kHz
February 2008
5
MIC2807
Min Typ
25
0.15
3
1.176 1.2
35
10
95
1 1.4
32
12.5
Max
50
2
1.224
40
150
5
2.5
Units
µs
µA
V/V
V
mV
µs
mΩ
µA
A
µs
%
220
30 100
µA
µs
–1 +1 %
–2 +2 %
0.02 0.3
%/V
0.2 0.5
%
20 mV
55 mV
70 120 mV
190 300
µA
70 dB
45 dB
225 300
700
mA
32 µVRMS
–1 +1 %
–2 +2 %
0.02 0.3
%/V
0.2 0.5
%
10 mV
30 70 mV
190 300
µA
65 dB
40 dB
40 60 150 mA
32 µVRMS
M9999-022008-B
5 Page 
Micrel, Inc.
Functional Characteristics (cont.)
LDO1 Start-Up Waveforms
MIC2807
LDO1 Load Transient
Time (10µs/div)
VIN = 3.6V
VOUT = 2.8V
IOUT = 200mA
COUT = 2.2µF
10mA
200mA
Time (20µs/div)
VIN = 3.6V
VOUT = 2.8V
COUT = 2.2µF
February 2008
11 M9999-022008-B
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet MIC2807.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| MIC280 | Thermal Supervisor | Micrel Semiconductor |
| MIC2800 | Digital Power Management IC | Micrel Semiconductor |
| MIC2803 | High-Voltage High-Current Darlington Array | Micrel Semiconductor |
| MIC2804 | High-Voltage High-Current Darlington Array | Micrel Semiconductor |
| 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 |