Yobon YB1210ST23R120, YB1210ST23R130, YB1210ST23R140, YB1210ST23R150, YB1210ST23R160 Schematic [ru]
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YB1210R
300mA, Ultra-Low-Noise, High PSRR LDO Regulator
Description
The YB1210R is a series of ultra-low-noise,
low dropout (LDO) linear regulators with
2.0% output voltage accuracy. The
YB1210R regulators achieve a low 320mV
dropout at 300mA load current of 3.3V
output and are available in voltages
ranging from 1.2V to 3.6V with 0.1 V per
step (custom voltage is considerable at
request).
The YB1210R regulators are optimized to
work with low-ESR and low cost ceramic
capacitors, reducing the amount of board
space critical in portable devices. The
YB1210R requires only 1.0μF output
capacitor for stability with any load and
consumes less than 1μA in shutdown
mode.
Built-in thermal shutdown and short-circuit
protect offer secure protection against fault
operation. The YB1210R regulators are
available in SOT-23 / SOT-25 / SOT-89
packages.
Features
High Accuracy Output Voltage : ± 2%
Wide Output Voltage Range : 1.2 ~ 3.6V
Ultra-Low-Noise Low-Drop-Out
Typical Output Current : 300 mA
Low Quiescent Current: ~60μA
320mV Dropout at 300mA 3.3V Output
Stable with 1.0μF Ceramic Capacitor
Only Need Input and Output Capacitors
Thermal Protection Shutdown
Output Short-Circuit Current Limit
Built-In Internal Soft-Start
Green Package (RoHS) Available
Applications
PDA, Notebook, PC Computers
DSC, Handset Camera Modules
PCMCIA Cards, PC Cameras
USB Based Portable Devices
GSM/GPRS/3G RF Transceiver
Wireless LANs
Bluetooth Portable Radios
Battery-Powered Devices
Typical Application Circuit
Figure 1-1: SOT-25 Application Circuit Figure 1-2: SOT-23/SOT-89 Application Circuit
YB1210R Rev.1.6 www.yobon.com.tw 1
Pin Configuration
YB1210R
300mA, Ultra-Low-Noise, High PSRR LDO Regulator
Figure 2: Pin Configuration
Pin Description
Table 1
Name Description
VIN Unregulated input supply. Bypass with a capacitor to GND.
GND Ground pin.
EN Pull high to enable the regulator.
N.C. or
BYPASS
VOUT Regulated output voltage. Bypass with a capacitor to GND.
Connect a 33nF capacitor to GND for low noise operation or N.C.
YB1210R Rev.1.6 www.yobon.com.tw 2
Ordering Information
YB1210R
300mA, Ultra-Low-Noise, High PSRR LDO Regulator
Marking Information
Absolute Maximum Ratings (Note 1)
Supply Voltage............................ -0.3V to 6V
Output Voltage................ -0.3V to (VIN+0.3V)
Output Short-Circuit Duration..............Infinite
Junction Temperature Range............ +150℃
Storage Temperature Range ....-65℃ to +150℃
Lead Temperature............................. +250℃
ESD Susceptibility (HBM)………………..2KV
ESD Susceptibility (MM) .......................200V
Note:
1. Exceeding these ratings may damage the device.
2. The device is not guaranteed to function outside of its operating conditions.
Recommended Operating Conditions
Input Supply Voltage............... 2.0V to 5.5V
Operating Temperature........-40℃ to +85℃
Thermal In formation (Note 3)
Thermal Resistance (SOT23/25, θJA) .... 280℃/W
Thermal Resistance (SOT-89, θJA)......... 180℃/W
Internal Power Dissipation (SOT-23/25, PD).0.4W
Internal Power Dissipation (SOT-89, PD) 0.55W
(Note 2)
3. θ
is measured in free air at TA = 25℃ on a low effective thermal conductivity board.
JA
YB1210R Rev.1.6 www.yobon.com.tw 3
300mA, Ultra-Low-Noise, High PSRR LDO Regulator
Electrical Characteristics
Table 2 V
IN
= ( V
+ 1V ), CIN = C
OUT
Description Symbol Test Conditions MIN TYP MAX Units
YB1210R
= 1.0μF, VEN = VIN, TA=25°C, unless otherwise noted.
OUT
Input Voltage Range
Output Voltage
Output Voltage Accuracy
Output Current Limit
Dropout Voltage (Note 1)
Ground Current
Line Regulation
Load Regulation
Shutdown Supply Current
Ripple Rejection (PSRR)
Start Up Delay (Note 2)
V
IN
V
OUT
ΔV
OUT
I
SC
V
DROP
I
G
ΔV
LINE
ΔV
LOAD
I
SD
PSRR
Predefined
I
= 10mA, V
I
OUT
Short-Circuit Output
V
= 3.6V, I
OUT
V
= 3.0V, I
OUT
V
= 2.5V, I
OUT
V
= 1.5V, I
OUT
V
= 1.2V, I
OUT
Iground = I
V
=(V
IN
I
= 1mA to 300mA
OUT
EN = 0V
= 10mA, V
OUT
f = 1KHz, I
f = 10KHz, I
f = 100KHz, I
IN
+ 1V) to 5.5V, I
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
OUT
- I
OUT
= 1mA
= 1mA
OUT
OUT
≧ 1.3V
= 1.2V
= 300mA
= 300mA
= 300mA
= 300mA
= 300mA
= 1mA
Rload = 100 ohm, Cbypass = 0nF
Rload = 100 ohm, Cbypass = 33nF
OUT
=10mA
2.0 5.5 V
1.2 3.6 V
-2.0 +2.0
%
0 +4.0
200 mA
300
350
450
mV
700
870
60
μA
0.3 0.4 %/V
1.0 1.5 %
1 μA
50
60
dB
40
20 50 μs
2 3.5 ms
Shutdown Delay (Note 3)
EN Logic Low Level
EN Logic High Level
EN Input Bias Current
Thermal Shutdown
Thermal Hysteresis
T
V
V
I
BEN
T
IL
IH
SD
HYS
Rload = 10K ohm, V
Rload = 10K ohm, V
V
= 2.0V to 5.5V
IN
V
= 2.0V to 5.5V
IN
V
= EN = V
IN
Shutdown Temperature
OUT
+1V
OUT
OUT
= 1.5V
= 1.2V
1
ms
1
0.4 V
1.2 V
V
IN
0.01 μA
160 °C
20 °C
Note :
1. The drop out voltage varies depending on output voltage selection. Dropout is defined as V
V
is 100mV below nominal V
OUT
2. Time needed for V
3. Time needed for V
to reach 90% of final value.
OUT
to discharge below 0.5V.
OUT
where VIN = V
OUT
+ 1V for nominal V
OUT
OUT
.
IN
– V
OUT
when
YB1210R Rev.1.6 www.yobon.com.tw 4
300mA, Ultra-Low-Noise, High PSRR LDO Regulator
Typical Performance Characteristics
V
= ( V
IN
+ 1V ), CIN = C
OUT
= 1.0μF, VEN = VIN, TA=25°C, unless otherwise noted.
OUT
YB1210R
Dropout Voltage vs. Output Load Ground Current vs. Input Voltage
Dropout Voltage vs. Temperature Dropout Voltage vs. Temperature
Output Voltage vs. Temperature Output Voltage vs. Temperature
YB1210R Rev.1.6 www.yobon.com.tw 5
YB1210R
300mA, Ultra-Low-Noise, High PSRR LDO Regulator
Load Transient Response Line Transient Response
Start Up Delay (Cbypass=0nF) Start Up Delay (Cbypass=33nF)
Shutdown Delay (V
=1.2V) Shutdown Delay (V
OUT
=1.5V)
OUT
YB1210R Rev.1.6 www.yobon.com.tw 6
YB1210R
300mA, Ultra-Low-Noise, High PSRR LDO Regulator
PSRR vs. Frequency (1mA load)
PSRR vs. Frequency (10mA load)
YB1210R Rev.1.6 www.yobon.com.tw 7
Function Block
YB1210R
300mA, Ultra-Low-Noise, High PSRR LDO Regulator
Figure 3: Function Block
Functional Description
The YB1210R is an ultra-low-noise,
low-quiescent current, low-dropout linear
regulator. It is supplied in a SOT-23 /
SOT-25 / SOT-89 package for different
applications. YB1210R can supply loads up
to 300mA (typical operation, not maximum)
and output voltages are preset and ranging
from 1.2V to 3.6V.
As shown in the Functional Block Diagram,
the YB1210R consists of a reference and
noise bypass circuit, error amplifier, output
drive transistor, internal feedback voltage
divider, thermal sensor, and short circuit
current limiter.
The internal reference is connected to the
error amplifier’s inverting input. The error
amplifier compares this reference with the
feedback voltage and amplifies the
difference. If the feedback voltage is lower
than the reference voltage, the gate of the
pass-transistor is pulled low. This allows
more current to pass to the output and
increases the output voltage. If the
feedback voltage is too high, the gate of the
pass transistor is pulled high, allowing less
current to pass to the output.
Stability
The YB1210R is a high performance LDO
emphasizing stability with low output
capacitance. It is able to maintain stability
with an output capacitor as low as 1.0μF.
The output capacitor can also be increased
to optimize performance. The YB1210R will
remain stable and in regulation with no load,
unlike many other voltage regulators.
YB1210R Rev.1.6 www.yobon.com.tw 8
YB1210R
300mA, Ultra-Low-Noise, High PSRR LDO Regulator
Internal P-Channel Pass Transistor
The YB1210R features a low impedance
P-channel MOSFET pass transistor. This
provides several advantages over similar
designs using a PNP pass transistor,
including low operating power and longer
battery life. The YB1210R consumes only
60µA of quiescent current under most
conditions.
Output Short-Circuit Current Limit
The YB1210R includes a current limiter,
which monitors and controls the pass
transistor’s gate voltage, limiting the output
current to about 200mA, for example, in a
short-circuit output situation.
Shutdown
The YB1210R also features a low-power
active shutdown mode. It has a switch that
turns off the device when disabled. This
allows the output capacitor and load to
discharge and de-energize the load. In the
shutdown mode, the internal functional
blocks, such as voltage reference and the
error amplifier, are turned off completely,
and the quiescent current is less than 1µA.
Thermal Protection Shutdown
The thermal protection shutdown function
protects the device from operating in over
temperature condition. When the junction
temperature exceeds +160°C, the thermal
sensor signals the shutdown logic, turning
off the pass transistor and allowing the IC
to cool down. The thermal sensor turns the
pass transistor on again after the IC’s
junction temperature drops to +140°C.
Auto-Discharge Circuitry
The YB1210R deploys a NMOS connecting
between V
pulled low, the NMOS is activated by an
inverted signal from EN. The charge kept
on output capacitor is discharged quickly
through the NMOS. It prevents the system
from abnormal operation at the beginning
of shutdown mode.
Soft-Start Circuitry
The YB1210R includes a soft-start circuitry
to limit inrush current at turn-on. During
power up, the output capacitor and output
load are charged with a reduced output
current. Shortly after the initial power up,
the soft-start feature is terminated and
normal operation is resumed.
and ground. When EN pin is
OUT
Application Information
Enable/Shutdown
The YB1210R comes with an active-high
enable pin that allows the regulator to be
enabled. Forcing the enable pin low
disables the regulator and puts it into the
shutdown mode. This pin cannot be left
floating as it may cause an undetermined
state.
Input/Output Capacitor
It is recommended to use a 1.0µF capacitor
on the YB1210R input and a 1.0µF
capacitor on the output. For high regulation
performance, larger input capacitor values
and lower ESRs provide better noise
rejection and line-transient response. The
output noise, load-transient response,
stability, and power-supply rejection can be
improved by using large output capacitors.
Low ESR ceramic capacitors provide
optimal performance and save space.
YB1210R Rev.1.6 www.yobon.com.tw 9
300mA, Ultra-Low-Noise, High PSRR LDO Regulator
Package Information (SOT-23)
E1
YB1210R
E
YB1210R Rev.1.6 www.yobon.com.tw 10
300mA, Ultra-Low-Noise, High PSRR LDO Regulator
Package Information (SOT-25)
YB1210R
e1
D
e
YB1210R Rev.1.6 www.yobon.com.tw 11
300mA, Ultra-Low-Noise, High PSRR LDO Regulator
Package Information (SOT-89)
YB1210R
L
A
C
NOTICE:
y The information described herein is subject to change without notice.
y Yobon does not assume any responsibility for use of any circuitry or applications described herein, nor
does it convey any patent license.
YB1210R Rev.1.6 www.yobon.com.tw 12
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