SiP21106/8
Vishay Siliconix
New Product
150-mA Low Noise, Low Dropout Regulator
APPLICATIONS
FEATURES
• Cellular Phones, Wireless Handsets
• PDAs
• MP3 Players
• TSC75-6L Package (1.6 x 1.6 x 0.6 mm)
• 1.0 % Output Voltage Accuracy at 25 °C
• Low Dropout Voltage: 135 mV at 150 mA
RoHS
COMPLIANT
• Digital Cameras
• SiP21106 Low Noise: 60 µV
(rms)
(10 Hz to 100 kHz Bandwidth)
• Pagers
with 10 nF in full load range
• Wireless Modem
• Noise-Sensitive Electronic Systems
• 35 µA (typical) Ground Current at 1 mA Load
• 1 µA Maximum Shutdown Current at 85 °C
• Output Auto Discharge at Shutdown Mode
DESCRIPTION
The SiP21106 150 mA BiCMOS low noise LDO volt-
age regulators are the perfect choice for low voltage
low power applications. An ultra low ground current in
addition to a low dropout voltage of 135 mV (at 150 mA
load) helps to extend battery life and makes these ICs
attractive for battery operated power systems and por-
table electronics. The SiP21108 does not require
external noise bypass capacitor and the output voltage
can be adjusted with an external resistor divider.
• Built-in Short Circuit (330 mA typical) and Thermal
Protection
• SiP21108 Adjustable Output Voltage Option
• - 40 °C to + 125 °C Junction Temperature Range for
Operation
• Uses Low ESR Ceramic Capacitors
• Fixed 1.3 V to 5 V with 50 mV Steps
TYPICAL APPLICATION CIRCUIT
Systems requiring a quiet voltage source, such as RF
applications, will benefit from the SiP21106's low out-
put noise. These regulators allow stable operation with
very small ceramic output capacitors, reducing
required board space and component cost. The
SiP21106/SiP21108 series are designed to maintain
regulation while delivering 330 mA peak current to sat-
isfy systems that have a high surge current upon turn-
on.
An active pull-down circuit is built into the SiP21106/
SiP21108 to improve the output transient response
and regulation. In shutdown mode, the output voltage
is automatically discharged to ground by a 100 Ω
N-Channel MOSFET.
TSC75-6L Package
1
2
3
6
5
4
Enable
BP
NC
EN
CBypass =10 nF
GND
SiP21106
VOUT
VIN
V
IN
VOUT
µF
COUT =1
CIN = 1
µF
TSC75-6L Package
The SiP21106/SiP21108 are available in a super thin
lead (Pb)-free TSC75-6L package for operation over
the industrial operation range (- 40 °C to 85 °C).
1
2
3
6
5
4
Enable
Adj
NC
EN
R
R
2
GND
SiP21108
1
VOUT
V
VIN
V
IN
OUT
OUT = 1 µF
CIN = 1µF
C
Document Number: 74442
S-62251–Rev. A, 06-Nov-06
www.vishay.com
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