YB1210 – 300mA
Ultra-Low-Noise, High PSRR LDO Regulator
Description
The YB1210 family consists of a series of
300mA ultra-low-noise, low dropout (LDO)
linear regulators especially designed for
battery-powered
RF
and
wireless
applications. The YB1210 regulator
achieves a low 450mV dropout at 250mA
load current of 3.3V output, ultra-low output
voltage noise of 15µVrms and PSRR of
57dB at 1KHz.
The YB1210 regulators are also optimized
to work with low-ESR and low cost ceramic
capacitors reducing the amount of board
space critical in hand-held devices. The
YB1210 requires only 0.47 µF output
capacitor for stability with any load. The
YB1210 consumes less than 1µA in
shutdown mode.
Other features include high output voltage
accuracy and current limiting protection.
The YB1210 regulators are available in
SOT-23 / SOT-25 / SOT-89 packages.
Features
High Accuracy +-2% Output Voltage
Ultra-Low-Noise Low-Drop-Out
Regulator with 1.8/2.5/2.6/2.8/3.0V/3.3V
Preset Outputs
Stable with 0.47µF Ceramic Capacitor
for Any Load
Allowable Output Current: 300mA
Low Quiescent Current: ~90µA
450mV Dropout at 250mA Load (3.3V)
Only Need Input and Output Capacitors
Power Saving Shutdown Mode (<1µA)
Thermal Protection Shutdown
Built-In Internal Soft-Start
Output Short-circuit Current Limit
Protection
Green package (RoHS) available
Applications
PDA, Palmtops and Notebook Computers
DSC, Handset Camera Modules
PCMCIA Cards, PC Cameras
USB Based Portable Devices (MP3, PMP)
GSM/GPRS/3G RF Transceiver Modules
Wireless LANs
Bluetooth Portable Radios
Typical Application Circuitry
INPUT
IN
Cin=0.47uF
ON
OFF
EN
YB1210
OUT
OUTPUT PRESET
Cout=0.47uF
NC or
Bypass
GND
Cbypass
=30nF
Figure 1-1. SOT-25 application circuit
YB1210 MRev.1.5
www.yobon.com.tw
1
YB1210 – 300mA
Ultra-Low-Noise, High PSRR LDO Regulator
Absolute Maximum Ratings
Supply Voltage........................................ -0.3V to 7.0V
Output Voltage ...............................-0.3V to (V
IN
+0.3V)
Output Short-Circuit Duration ........................... Infinite
Junction Temperature Range........................... +150℃
Storage Temperature Range ............. -65℃ to +150℃
Lead Temperature............................................ +250℃
Thermal Resistance (SOT-23/25,
θJA)..........
280℃/W
Thermal Resistance (SOT-89,
θJA)...............
180℃/W
Internal Power Disspation (SOT-23/25, PD)........0.4W
Internal Power Disspation (SOT-89, PD)...........0.55W
Recommended Operating Conditions
Input Supply Voltage................................ 2V to 6.0V
Operating Temperature..................... -40℃ to +85℃
ESD Susceptibility (HBM).................................. 2KV
ESD Susceptibility (MM)...................................200V
Electrical Characteristics
Table 3
T
A
= 25℃, V
IN
= ( V
OUT
+ 1 V ), C
IN
= C
OU T
= 0.47µF, V
EN
= V
IN
Function Parameter
Input Voltage Range
Output Voltage
Output Voltage Accuracy
Output Current Limit
Conditions
Min
2.0
Typ
Max
6.0
3.3
+2.0
Units
V
V
%
mA
Predefined (metal masks)
I
OUT
= 10mA
Short-circuit output
V
OUT
= 3.3V, I
OUT
= 250mA
V
OUT
= 3.0V, I
OUT
= 250mA
1.8
-2.0
200
450
470
500
520
540
800
90
0.3
1.2
~0.01
250
550
590
600
620
640
900
150
0.5
3
Dropout Voltage
(See Note 1)
V
OUT
= 2.8V, I
OUT
= 250mA
V
OUT
= 2.6V, I
OUT
= 250mA
V
OUT
= 2.5V, I
OUT
= 250mA
V
OUT
= 1.8V, I
OUT
= 250mA
mV
Ground Current
Line Regulation
Load Regulation
Shutdown Supply Current
I
OUT
= 0 mA
V
IN
= (V
OUT
+1V) to 6.0V, I
OUT
= 10 mA
I
OUT
= 1mA to 250mA
EN=0V
µA
%/V
%
µA
YB1210 MRev.1.5
www.yobon.com.tw
4
YB1210 – 300mA
Ultra-Low-Noise, High PSRR LDO Regulator
f = 100Hz, I
OUT
=1mA
Ripple Rejection (PSRR)
f = 1KHz, I
OUT
=1mA
f = 10KHz, I
OUT
=1mA
f = 100Hz to 100KHz,
Output Noise Voltage
Iload=10mA, Bypass=0nF
f = 100Hz to 100KHz,
Iload=10mA, Bypass=30nF
Shutdown Exit Delay
(See Note 2)
EN Logic Low Level
EN Logic High Level
EN Input Bias Current
Thermal Shutdown
Thermal-Shutdown Hysteresis
Rload=50ohm
V
IN
=2.0V to 5.5V
V
IN
=2.0V to 5.5V
V
IN
=5.5V, SHDN=0V or 6V
Shutdown Temperature
1.2
55
57
55
45
µVrms
dB
15
45
300
0.4
VIN
0.01
160
20
µVrms
µs
V
V
µA
℃
℃
Note1 :
The drop out voltage varies depending on output voltage selection
Dropout is defined as V
IN
– V
OUT
when V
OUT
is 100mV below V
OUT
where Vin=Vout + 1V for nominal
V
OUT
.
Note 2:
Time needed for V
OUT
to reach 90% of final value.
Typical Characteristics
At T
A
=25℃, V
IN
=(V
OUT
+0.5V), C
IN
=C
OUT
=0.47µF, V
EN
=V
IN
, unless otherwise noted.
Ground Current vs. Input Voltage
140
Dropout Voltage vs Load Current
900
800
Dropout Voltage (m V)
700
600
500
400
300
200
100
0
0
10
30
50
70
90
Vo=1.8V
Vo=2.5V
Ground Current (µA)
120
100
80
60
40
20
0
0.0
1.0
2.0
3.0
4.0
5.0
Vo=3.3V
Vo=3.3V
Input Voltage (V)
110 130 150 170 190 210 230 250
Load Current (m A)
YB1210 MRev.1.5
www.yobon.com.tw
5
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