YB1200 – High Accuracy
Ultra-Low-Noise, High PSRR LDO Regulator
Description
The YB1200 family consists of a series of
150mA ultra-low-noise, low dropout (LDO)
linear regulators especially designed for
battery-powered
RF
and
wireless
applications. The YB1200 regulator
achieves a low 250mV dropout at 150mA
load current of 3.3V output, ultra-low output
voltage noise of 15µVrms and PSRR of
57dB at 1KHz.
The YB1200 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
YB1200 requires only 0.47 µF output
capacitor for stability with any load. The
YB1200 consumes less than 1µA in
shutdown mode.
Other features include high output voltage
accuracy and current limiting protection.
The YB1200 regulators are available in a
tiny SC-70 / SC-82 package.
Features
High Accuracy +-2%
Ultra-Low-Noise Low-Drop-Out
Regulator with 1.8/2.5/2.6/2.8/3.0/3.3V
Preset Outputs
Stable with 0.47µF Ceramic Capacitor
for Any Load
Typical Output Current: 150mA
Low Quiescent Current: ~90µA
250mV Dropout at 150mA 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 Circuit
INPUT
IN
Cin=0. 47 uF
ON
OFF
EN
YB1200
OUT
OUTPUT PRESET
NC or
Bypass
GND
Cout=0. 47 uF
Cbypass
=30nF
Figure 1-1. SC-70 application circuit
YB1200 MRev.1.4
www.yobon.com.tw
1
YB1200 – High Accuracy
Ultra-Low-Noise, High PSRR LDO Regulator
INPUT
IN
Cin=0. 47 uF
ON
OFF
EN
YB1200
OUT
OUTPUT PRESET
Cout=0. 47 uF
GND
Figure 1-2. SC-82 application circuit
Pin Configuration
SC-70
Figure 2. Pin configuration
Pin Description
Table 1
Pin
1
2
3
4
5
Pin
1
2
3
4
Name
IN
GND
EN
N.C.
Bypass
OUT
Name
EN
GND
OUT
IN
Pull high to enable the regulator.
Ground pin.
Regulated Output Voltage.
Unregulated Input Supply.
Unregulated Input Supply.
Ground pin.
Pull high to enable the regulator.
SC-70 Description
No external connection needed for normal operation.
Noise Bypass for Ultra-Low-Noise Operation by connecting a 30nF capacitor from
Bypass to GND.
Regulated Output Voltage. Bypass with a capacitor to GND.
SC-82 Description
YB1200 MRev.1.4
www.yobon.com.tw
2
YB1200 – High Accuracy
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 (SC-70/82,
θJA)
............ 330℃/W
Internal Power Disspation (SC-70/82, PD)……...0.3W
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
+ 1V ), C
IN
= C
OUT
= 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
= 150mA
V
OUT
= 3.0V, I
OUT
= 150mA
1.8
-2.0
200
250
275
300
310
320
500
90
0.3
1.2
~0.01
Dropout Voltage
(See Note 1)
V
OUT
= 2.8V, I
OUT
= 150mA
V
OUT
= 2.6V, I
OUT
= 150mA
V
OUT
= 2.5V, I
OUT
= 150mA
V
OUT
= 1.8V, I
OUT
= 150mA
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 150mA
EN=0V
µA
%/V
%
µA
YB1200 MRev.1.4
www.yobon.com.tw
4
YB1200 – High Accuracy
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
Output Noise Voltage
Shutdown Exit Delay
(See Note 2)
EN Logic Low Level
EN Logic High Level
EN Input Bias Current
Thermal Shutdown
Thermal-Shutdown ysteresis
Note1 : The drop out voltage varies depending on output voltage selection
f = 100Hz to 100KHz,
Iload=10mA, Bypass=0nF
f = 100Hz to 100KHz,
Iload=10mA, Bypass=30nF
Rload=50ohm
V
IN
=2.0V to 5.5V
V
IN
=2.0V to 5.5V
V
IN
=5.5V, EN=0V or 6V
Shutdown Temperature
1.2
52
55
53
45
15
45
300
0.4
VIN
0.01
160
20
µVrms
µVrms
µs
V
V
µA
℃
℃
dB
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
+ 1V), C
IN
= C
OUT
= 0.47µF, V
EN
= V
IN
, unless otherwise noted.
Dropout Voltage vs Load Current
600
Dropout Voltage vs Temperature
400
Dropout Voltage (m V)
Vo=1.8V
400
300
200
100
0
0
10
30
50
70
90
110
130
150
D ropout V oltage (m V )
500
350
300
250
200
150
100
50
0
0
Vo=2.8V
85℃
Vo=2.5V
25℃
Vo=3.3V
Load Current (m A)
10
30
50
70
90
110
130
150
Load Current (m A)
YB1200 MRev.1.4
www.yobon.com.tw
5
PCB Design
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