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Excelliance MOS |
600mA High PSRR Low Noise LDO
EM1106
General Description
The EM1106 performs ultra low drop voltage,
high power supply rejection ratio (PSRR), fast
response, low noise linear regulator, and designed
to continuously deliver up to 600mA output current.
The EM1106 has wide adjustable output voltage
range and high output accuracy to 2%.
No by-pass capacitor is needed for this device
and only 1uF ceramic capacitor is required for
stability in any loading conditions. It reduces the
amount of board space necessary for power
applications.
The other features include soft start, current
limit protection, Power-On-Reset function, and
over temperature protection. The EM1106 is
available in SOT-23-5 package.
Ordering Information
Part Number
EM1106J
Package
SOT-23-5L
Remark
EM1106V
DFN 2X2-6L
Applications
Cellular Handsets
Battery-Powered Equipment
Laptop, Palmtops, Notebook Computers
Hand-Held Instruments
PCMCIA Cards
Portable Information Applications
Pin Configuration
SOT23-5
DFN 2X2-6L
Features
Typical Application Circuit
Ultra Fast Response in Line/Load Transient
Wide VIN Range from 2.5V to 5.5V
Adjustable Output Voltage from 0.8V to 4.5V
Ultra Low Dropout Voltage: 400mV @600mA
High Power Supply Rejection Ratio
70dB at 1kHz
60dB at 10kHz
Ultra Low Output Noise Voltage 100uV(RMS)
Low Shutdown Current < 1uA
Only 1uF Ceramic Capacitor required for
stability
Over Temperature Protection
Current Limit Protection
RoHS Compliant and 100% Lead (Pb)-Free
2013/02/05
Rev.A.1
1
Pin Assignment
EM1106
Pin Name
Pin No.
SOT-23-5 DFN2X2-6L
Pin Function
VIN 1
3
Input Voltage. This is the source input to the power device that
supplies current to the output pin.
GND 2
7 Ground.
EN 3
1 Chip Enable Input (Active high).
Feedback Voltage. FB is the non-inverting input to the error
FB 4
amplifier. A resistor divider from the output to GND is used to set
6 the regulation voltage as VOUT = 0.8 *(1 + R1 R2 )(V). This pin has
high impedance and should be kept from noisy source to guarantee
stable operation.
Output Voltage. VOUT is power output pin. An internal pull low
VOUT
5
4 resistance exists when the device is disabled. Minimum 1uF low ESR
ceramic capacitor is required at this pin for stabilizing VOUT voltage.
Function Block Diagram
2013/02/05
Rev.A.1
2
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