Yobon YB1253ST23X120, YB1253ST23X130, YB1253ST23X140, YB1253ST23X150, YB1253ST23X160 Schematic [ru]
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300mA, Low Power, High PSRR LDO Regulator
Description
The YB1253 is a series of ultra-low-noise,
high PSRR, and low quiescent current low
dropout (LDO) linear regulators with 2.0%
output voltage accuracy. The YB1253
regulators achieve a low 300mA dropout at
300mA load current of 3.6V output and are
available in voltages ranging from 1.2V to
3.6V with 0.1 V per step (custom voltage is
considerate at request).
The YB1253 regulators are optimized to
work with low-ESR and low cost ceramic
capacitors, reducing the amount of board
space critical in portable devices. The
YB1253 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
current limit offer secure protection against
fault operation. YB1253 regulators also
include an auto-discharge function. The
YB1253 regulators are available in SOT-23
/ SOT-25 / SOT-89 packages.
Typical Application Circuitry
YB1253
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: ~10μA
• 300mV Dropout at 300mA 3.6V Output
• Stable with 1.0μF Ceramic Capacitor
• Only Need Input and Output Capacitors
• Thermal Protection Shutdown
• Auto discharge function
• Green Package (RoHS) Available
Applications
• PDA, Notebook, PC Computers
• DSC, Cellular phones
• PCMCIA Cards, PC Cameras
• USB Based Portable Devices
• GSM/GPRS/3G RF Transceiver
• Wireless LANs
• Bluetooth Portable Radios
• Battery-Powered Devices
Input
Cin=1uF
ON
OFF
VIN VOUT
YB1253
EN
GND
Output
Cout=1uF
Input
Cin=1uF
Figure 1-2 : SOT-23 application circuit
VIN VOUT
YB1253
GND
Output
Cout=1uF
Figure 1-1 : SOT-25 application circuit
YB1253 Rev. 1.5 www.yobon.com.tw 1
Pin Configuration
SOT-89
123
GND VIN
VOUT
YB1253
300mA, Low Power, High PSRR LDO Regulator
NC
4
3
EN
SOT-89R
123
VOUT GND
Figure 2 : pin configuration
VIN
VIN
3
VOUT
5
SOT-23
12
VOUTGND
1
VIN
SOT-25
2
GND
Pin Description
Table 1
Pin Name Pin Function
VIN
Unregulated Input Supply. Bypass with a capacitor to GND
GND Ground pin
EN Pull high to enable the regulator
NC No connection is required
VOUT Regulated Output Voltage
YB1253 Rev. 1.5 www.yobon.com.tw 2
300mA, Low Power, High PSRR LDO Regulator
Ordering Information
YB1253
X
Output Voltage
120 : 1.2V
130 : 1.3V
:
360 : 3.6V
X : fix ed
Package Type
ST23 : SOT-23
ST25 : SOT-25
ST89 : SOT-89
ST8R : SOT-89R
YB1253
*Order example :
YB1253 ST 89X250 for YB1253 of
2.5V output and SOT-89 package
*Shipping Quantity :
SOT-23 : 3000 units tape & reel
SOT-25 : 3000 units tape & reel
SOT-89 : 1000 units tape & reel
SOT-89R : 1000 units tape & reel
*Only green package
Marking Information
Absolute Maximum Ratings (Note 1)
Supply Voltage ................................-0.3V to 6.0V
Output Voltage .......................-0.3V to (V
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.
3. θ
is measured in free air at TA = 25℃ on a low effective thermal conductivity board.
JA
+0.3V)
IN
Recommended Operating Conditions
Input Supply Voltage.........................2V to 5.5V
Operating Temperature..............-40℃ to +85℃
Thermal Information (Note 3)
Thermal Resistance (SOT-23/25, θJA).280℃/W
Thermal Resistance (SOT-89, θJA)…...180℃/W
Internal Power Dis si pat io n (SOT-23/25, PD)……0.4W
Internal Power Dissipation (SOT-89, PD)0.55W
(Note 2)
YB1253 Rev. 1.5 www.yobon.com.tw 3
YB1253
300mA, Low Power, High PSRR LDO Regulator
Electrical Characteristics
Table 2
TA = 25℃, V
Function Parameter Conditions Min Typ Max Units
Input Voltage Range 2.0 5.5 V
Output Voltage, VOUT Predefined 1.2 3.6 V
Output Voltage Accuracy
Output Current Limit Short-circuit output 500 mA
IN
= ( V
+ 1 V ), C
OUT
= C
IN
I
= 10mA, VOUT >= 1.3V -2.0 +2.0 %
OUT
I
= 10mA, VOUT = 1.2V 0 +4.0 %
OUT
Vout = 3.6V, Iout = 300 mA 300
Vout = 3.3V, Iout = 300 mA 350
= 1.0μF, V
OU T
EN
= V
unless otherwise
IN,
Dropout Voltage (Note 1)
Ground Current Iground = Iin - Iout 10 μA
Line Regulation Vin = (Vout+1V) to 5.5V, Iout =10mA 0.10 0.20 %/V
Load Regulation Iout = 1mA to 300 mA 0.005 0.01 %/mA
Shutdown Supply Current EN = Vin=0V 1 μA
Ripple Rejection (PSRR)
Start Up Delay (Note 3) Rload=100ohm 200 μS
Shutdown Delay
EN Logic Low Level Vin = 2.0V to 5.5V 0.4 V
EN Logic High Level Vin = 2.0V to 5.5V 1.2 Vin V
EN Input Bias Current Vin = EN = 3V 1.5 μA
Thermal Shutdown Shutdown Temperature 160 °C
Thermal Hysteresis 20 °C
Note 1: The dropout voltage varies depending on output voltage selection. Dropout is defined as VIN–V
below nominal V
where Vin=Vout + 1V for nominal V
OUT
Vout = 2.8V, Iout = 300 mA 430
Vout = 1.8V, Iout = 300 mA 600
Vout = 1.2V, Iout = 300 mA 900
(Note 2)
Rload=10K ohm, VOUT=1.5V 1 mS
R
load=10K ohm, VOUT=1.2V 1 mS
.
OUT
50 dB
when V
OUT
OUT
mV
is 100mV
Note 2: PSRR is tested at Vin=3.8+1Vppac, Vout=2.8V, I_load=1mA.
Note 3: Time needed for V
to reach 90% of final value.
OUT
YB1253 Rev. 1.5 www.yobon.com.tw 4
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