BCD AP2121AK-3.2TRE1 High speed, extremely low noise ldo regulator Datasheet

Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
General Description
Features
The AP2121 series are positive voltage regulator ICs
fabricated by CMOS process. Each of these ICs consists of a voltage reference, an error amplifier, a resistor network for setting output voltage, a current limit
circuit for current protection and a chip enable circuit
(5-pin products only).
·
·
·
·
·
The AP2121 series feature high ripple rejection, low
dropout voltage, low noise, high output voltage accuracy, and low current consumption which make them
ideal for use in various battery-powered devices.
·
·
·
·
·
The AP2121 series have 1.5V, 1.8V, 2.5V, 2.8V, 3.0V,
3.2V and 3.3V versions.
The AP2121 are available in standard SOT-23-3 and
SOT-23-5 packages.
·
AP2121
Low Dropout Voltage at IOUT=100mA: 150mV
Typical (Except 1.5V Version)
Low Standby Current: 0.1µA Typical
Low Quiescent Current: 25µA Typical
High Ripple Rejection: 70dB Typical(f=10kHz)
Maximum Output Current: More Than 150mA
(300mA Limit)
Extremely Low Noise: 30µVrms (10Hz to
100kHz)
Excellent Line Regulation: 4mV Typical
Excellent Load Regulation: 12mV Typical
High Output Voltage Accuracy: ±2%
Excellent Line Transient Response and Load
Transient Response
Compatible with Low ESR Ceramic Capacitor (as
Low as 1µF)
Applications
·
·
·
·
·
·
Mobile Phones, Cordless Phones
Wireless Communication Equipment
Portable Games
Cameras, Video Recorders
Sub-board Power Supplies for Telecom Equipment
Battery Powered Equipment
SOT-23-5
SOT-23-3
Figure 1. Package Types of AP2121
Mar. 2007 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
1
Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
Pin Configuration
N Package
(SOT-23-3)
K Package
(SOT-23-5)
VIN
3
1
GND
2
VIN
1
GND
2
CE
3
5
VOUT
4
NC
VOUT
Figure 2. Pin Configuration of AP2121 (Top View)
Pin Description
Pin Number
Pin Name
Function
SOT-23-3
SOT-23-5
3
1
VIN
Input voltage
1
2
GND
Ground
3
CE
Active high enable input pin. Logic high=enable, logic low=shutdown
4
NC
No connection
5
VOUT
2
Regulated output voltage
Mar. 2007 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
2
Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
Functional Block Diagram
VIN
3
2
VIN
VOUT
1
5
VOUT
VREF
VREF
CURRENT LIMIT
CURRENT LIMIT
1
CE
GND
3
2
GND
SOT-23-5
SOT-23-3
Figure 3. Functional Block Diagram of AP2121
Mar. 2007 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
3
Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
Ordering Information
AP2121
E1: Lead Free
Circuit Type
TR: Tape and Reel
A: Active High
(Pull-down resistor built-in)
Blank: No Enable Function
1.5:
1.8:
2.5:
2.8:
3.0:
3.2:
3.3:
Package
N: SOT-23-3
K: SOT-23-5
Package
SOT-23-3
SOT-23-5
Temperature Range
Condition
Part Number
-40 to 85oC
-40 to 85oC
Fixed Output 1.5V
Fixed Output 1.8V
Fixed Output 2.5V
Fixed Output 2.8V
Fixed Output 3.0V
Fixed Output 3.2V
Fixed Output 3.3V
Marking ID
Packing Type
AP2121N-1.5TRE1
EF1
Tape & Reel
AP2121N-1.8TRE1
EF3
Tape & Reel
AP2121N-2.5TRE1
EF4
Tape & Reel
AP2121N-2.8TRE1
EF5
Tape & Reel
AP2121N-3.0TRE1
EF6
Tape & Reel
AP2121N-3.2TRE1
EF7
Tape & Reel
AP2121N-3.3TRE1
EF8
Tape & Reel
Active High (Pull-down resistor built-in) AP2121AK-1.5TRE1
E1Z
Tape & Reel
Active High (Pull-down resistor built-in) AP2121AK-1.8TRE1
E1U
Tape & Reel
Active High (Pull-down resistor built-in) AP2121AK-2.5TRE1
E1V
Tape & Reel
Active High (Pull-down resistor built-in) AP2121AK-2.8TRE1
E1W
Tape & Reel
Active High (Pull-down resistor built-in) AP2121AK-3.0TRE1
E1X
Tape & Reel
Active High (Pull-down resistor built-in) AP2121AK-3.2TRE1
E3Z
Tape & Reel
Active High (Pull-down resistor built-in) AP2121AK-3.3TRE1
E1Y
Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
Mar. 2007 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
4
Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
Absolute Maximum Ratings (Note 1)
Parameter
Symbol
Value
Unit
Input Voltage
VIN
6.5
V
Enable Input Voltage
VCE
-0.3 to VIN+0.3
V
Output Current
IOUT
300
mA
TJ
150
o
TSTG
-65 to 150
oC
TLEAD
260
oC
Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10sec)
C
SOT-23-3
250
SOT-23-5
250
Thermal Resistance (Note 2)
θJA
ESD (Human Body Model)
ESD
2000
V
ESD (Machine Model)
ESD
200
V
oC/W
Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device.
These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated
under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods
may affect device reliability.
Note 2: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Electrical specifications do not apply when operating the device outside of its operating ratings. The maximum allowable power dissipation is a
function of the maximum junction temperature, TJ(max), the junction-to-ambient thermal resistance, θJA, and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using: PD(max)=(TJ(max) TA)/θJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature.
Recommended Operating Conditions
Parameter
Symbol
Min
Max
Unit
Input Voltage
VIN
2
6
V
TJ
-40
85
oC
Operating Junction Temperature Range
Mar. 2007 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
5
Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
Electrical Characteristics
AP2121-1.5 Electrical Characteristics
(VIN=2.5V, TJ=25oC, CIN=1µF, COUT=1µF, Bold typeface applies over -40oC≤TJ≤85oC, unless otherwise specified.)
Parameter
Output Voltage
Symbol
VOUT
Input Voltage
VIN
Output Current
IOUT
Conditions
VIN=2.5V
1mA≤IOUT≤30mA
VIN-VOUT=1V
Min
Typ
Max
Unit
1.47
1.5
1.53
V
6
V
150
mA
Load Regulation
VRLOAD
VIN=2.5V
1mA≤IOUT≤80mA
12
40
mV
Line Regulation
VRLINE
2.3V≤VIN≤6V
IOUT=30mA
4
16
mV
Dropout Voltage
VDROP
Quiescent Current
IQ
IOUT=10mA
400
600
IOUT=100mA
400
600
IOUT=150mA
400
600
VIN=2.5V, IOUT=0mA
25
50
µA
1
µA
mV
Standby Current
ISTD
VIN=2.5V
VCE in OFF mode
0.1
Power Supply
Rejection Ratio
PSRR
Ripple 0.5Vp-p, f=10kHz
VIN=2.5V
70
dB
±150
µV/oC
±100
ppm/oC
50
mA
30
µVrms
Output Voltage
Temperature Coefficient
Short Current Limit
RMS Output Noise
∆VOUT/∆T
(∆VOUT/VOUT)/∆T
ILIMIT
VNOISE
IOUT=30mA
VOUT=0V
o
TA=25 C
10Hz ≤f≤100kHz
CE "High" Voltage
CE input voltage "High"
CE "Low" Voltage
CE input voltage "Low"
CE Pull-down Resistance
RPD
1.5
2.5
Mar. 2007 Rev. 1. 4
V
5
0.25
V
10
MΩ
BCD Semiconductor Manufacturing Limited
6
Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
Electrical Characteristics (Continued)
AP2121-1.8 Electrical Characteristics
(VIN=2.8V, TJ=25oC, CIN=1µF, COUT=1µF, Bold typeface applies over -40oC≤TJ≤85oC, unless otherwise specified.)
Parameter
Output Voltage
Symbol
VOUT
Input Voltage
VIN
Output Current
IOUT
Conditions
VIN=2.8V
1mA≤IOUT≤30mA
VIN-VOUT=1V
Min
Typ
Max
Unit
1.764
1.8
1.836
V
6
V
150
mA
Load Regulation
VRLOAD
VIN=2.8V
1mA≤IOUT≤80mA
12
40
mV
Line Regulation
VRLINE
2.3V≤VIN≤6V
IOUT=30mA
4
16
mV
Dropout Voltage
VDROP
Quiescent Current
IQ
IOUT=10mA
20
40
IOUT=100mA
150
300
IOUT=150mA
200
400
VIN=2.8V, IOUT=0mA
25
50
µA
1
µA
mV
Standby Current
ISTD
VIN=2.8V
VCE in OFF mode
0.1
Power Supply
Rejection Ratio
PSRR
Ripple 0.5Vp-p, f=10kHz
VIN=2.8V
70
dB
±180
µV/oC
±100
ppm/oC
50
mA
30
µVrms
Output Voltage
Temperature Coefficient
Short Current Limit
RMS Output Noise
∆VOUT/∆T
(∆VOUT/VOUT)/∆T
ILIMIT
VNOISE
IOUT=30mA
VOUT=0V
o
TA=25 C
10Hz ≤f≤100kHz
CE "High" Voltage
CE input voltage "High"
CE "Low" Voltage
CE input voltage "Low"
CE Pull-down Resistance
RPD
1.5
2.5
Mar. 2007 Rev. 1. 4
V
5
0.25
V
10
MΩ
BCD Semiconductor Manufacturing Limited
7
Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
Electrical Characteristics (Continued)
AP2121-2.5 Electrical Characteristics
(VIN=3.5V, TJ=25oC, CIN=1µF, COUT=1µF, Bold typeface applies over -40oC≤TJ≤85oC, unless otherwise specified.)
Parameter
Output Voltage
Symbol
VOUT
Input Voltage
VIN
Output Current
IOUT
Conditions
VIN=3.5V
1mA≤IOUT≤30mA
VIN-VOUT=1V
Min
Typ
Max
Unit
2.45
2.5
2.55
V
6
V
150
mA
Load Regulation
VRLOAD
VIN=3.5V
1mA≤IOUT≤80mA
12
40
mV
Line Regulation
VRLINE
3V≤VIN≤6V
IOUT=30mA
4
16
mV
IOUT=10mA
20
40
Dropout Voltage
VDROP
IOUT=100mA
150
300
IOUT=150mA
200
400
VIN=3.5V, IOUT=0mA
25
50
µA
VIN=3.5V
VCE in OFF mode
0.1
1
µA
Ripple 0.5Vp-p, f=10kHz
VIN=3.5V
70
dB
±250
µV/oC
±100
ppm/oC
50
mA
30
µVrms
Quiescent Current
IQ
Standby Current
ISTD
Power Supply
Rejection Ratio
PSRR
Output Voltage
Temperature Coefficient
Short Current Limit
RMS Output Noise
∆VOUT/∆T
(∆VOUT/VOUT)/∆T
ILIMIT
VNOISE
IOUT=30mA
VOUT=0V
o
TA=25 C
10Hz ≤f≤100kHz
CE "High" Voltage
CE input voltage "High"
CE "Low" Voltage
CE input voltage "Low"
CE Pull-down Resistance
RPD
1.5
2.5
Mar. 2007 Rev. 1. 4
mV
V
5
0.25
V
10
MΩ
BCD Semiconductor Manufacturing Limited
8
Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
Electrical Characteristics (Continued)
AP2121-2.8 Electrical Characteristics
(VIN=3.8V, TJ=25oC, CIN=1µF, COUT=1µF, Bold typeface applies over -40oC≤TJ≤85oC, unless otherwise specified.)
Parameter
Output Voltage
Symbol
VOUT
Input Voltage
VIN
Output Current
IOUT
Conditions
VIN=3.8V
1mA≤IOUT≤30mA
VIN-VOUT=1V
Min
Typ
Max
Unit
2.744
2.8
2.856
V
6
V
150
mA
Load Regulation
VRLOAD
VIN=3.8V
1mA≤IOUT≤80mA
12
40
mV
Line Regulation
VRLINE
3.3V≤VIN≤6V
IOUT=30mA
4
16
mV
Dropout Voltage
VDROP
Quiescent Current
IQ
IOUT=10mA
20
40
IOUT=100mA
150
300
IOUT=150mA
200
400
VIN=3.8V, IOUT=0mA
25
50
µA
1
µA
mV
Standby Current
ISTD
VIN=3.8V
VCE in OFF mode
0.1
Power Supply
Rejection Ratio
PSRR
Ripple 0.5Vp-p, f=10kHz
VIN=3.8V
70
dB
±280
µV/oC
±100
ppm/oC
50
mA
30
µVrms
Output Voltage
Temperature Coefficient
Short Current Limit
RMS Output Noise
∆VOUT/∆T
(∆VOUT/VOUT)/∆T
ILIMIT
VNOISE
IOUT=30mA
VOUT=0V
o
TA=25 C
10Hz ≤f≤100kHz
CE "High" Voltage
CE input voltage "High"
CE "Low" Voltage
CE input voltage "Low"
CE Pull-down Resistance
RPD
1.5
2.5
Mar. 2007 Rev. 1. 4
V
5
0.25
V
10
MΩ
BCD Semiconductor Manufacturing Limited
9
Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
Electrical Characteristics (Continued)
AP2121-3.0 Electrical Characteristics
(VIN=4V, TJ=25oC, CIN=1µF, COUT=1µF, Bold typeface applies over -40oC≤TJ≤85oC, unless otherwise specified.)
Parameter
Output Voltage
Symbol
VOUT
Input Voltage
VIN
Output Current
IOUT
Conditions
VIN=4V
1mA≤IOUT≤30mA
VIN-VOUT=1V
Min
Typ
Max
Unit
2.94
3.0
3.06
V
6
V
150
mA
Load Regulation
VRLOAD
VIN=4V
1mA≤IOUT≤80mA
12
40
mV
Line Regulation
VRLINE
3.5V≤VIN≤6V
IOUT=30mA
4
16
mV
IOUT=10mA
20
40
IOUT=100mA
150
300
IOUT=150mA
200
400
VIN=4V, IOUT=0mA
25
50
µA
1
µA
Dropout Voltage
Quiescent Current
VDROP
IQ
mV
Standby Current
ISTD
VIN=4V
VCE in OFF mode
0.1
Power Supply
Rejection Ratio
PSRR
Ripple 0.5Vp-p, f=10kHz
VIN=4V
70
dB
±300
µV/oC
±100
ppm/oC
Output Voltage
Temperature Coefficient
∆VOUT/∆T
(∆VOUT/VOUT)/∆T
IOUT=30mA
Short Current Limit
ILIMIT
VOUT=0V
50
mA
RMS Output Noise
VNOISE
TA=25oC
10Hz ≤f≤100kHz
30
µVrms
CE "High" Voltage
CE input voltage "High"
CE "Low" Voltage
CE input voltage "Low"
CE Pull-down Resistance
RPD
1.5
2.5
Mar. 2007 Rev. 1. 4
V
5
0.25
V
10
MΩ
BCD Semiconductor Manufacturing Limited
10
Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
Electrical Characteristics (Continued)
AP2121-3.2 Electrical Characteristics
(VIN=4.2V, TJ=25oC, CIN=1µF, COUT=1µF, Bold typeface applies over -40oC≤TJ≤85oC, unless otherwise specified.)
Parameter
Output Voltage
Symbol
VOUT
Input Voltage
VIN
Output Current
IOUT
Conditions
VIN=4.2V
1mA≤IOUT≤30mA
VIN-VOUT=1V
Min
Typ
Max
Unit
3.136
3.2
3.264
V
6
V
150
mA
Load Regulation
VRLOAD
VIN=4.2V
1mA≤ IOUT≤ 80mA
12
40
mV
Line Regulation
VRLINE
3.7V≤VIN≤6V
IOUT=30mA
4
16
mV
Dropout Voltage
VDROP
Quiescent Current
IQ
IOUT=10mA
20
40
IOUT=100mA
150
300
IOUT=150mA
200
400
VIN=4.2V, IOUT=0mA
25
50
µA
1
µA
mV
Standby Current
ISTD
VIN=4.2V
VCE in OFF mode
0.1
Power Supply
Rejection Ratio
PSRR
Ripple 0.5Vp-p, f=10kHz
VIN=4.2V
70
dB
±320
µV/oC
±100
ppm/oC
50
mA
30
µVrms
Output Voltage
Temperature Coefficient
Short Current Limit
RMS Output Noise
∆VOUT/∆T
(∆VOUT/VOUT)/∆T
ILIMIT
VNOISE
IOUT=30mA
VOUT=0V
o
TA=25 C
10Hz ≤f≤100kHz
CE "High" Voltage
CE input voltage "High"
CE "Low" Voltage
CE input voltage "Low"
CE Pull-down Resistance
RPD
1.5
2.5
Mar. 2007 Rev. 1. 4
V
5
0.25
V
10
MΩ
BCD Semiconductor Manufacturing Limited
11
Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
Electrical Characteristics (Continued)
AP2121-3.3 Electrical Characteristics
(VIN=4.3V, TJ=25oC, CIN=1µF, COUT=1µF, Bold typeface applies over -40oC≤TJ≤85oC, unless otherwise specified.)
Parameter
Output Voltage
Symbol
VOUT
Input Voltage
VIN
Output Current
IOUT
Conditions
VIN=4.3V
1mA≤IOUT≤30mA
VIN-VOUT=1V
Min
Typ
Max
Unit
3.234
3.3
3.366
V
6
V
150
mA
Load Regulation
VRLOAD
VIN=4.3V
1mA≤ IOUT≤ 80mA
12
40
mV
Line Regulation
VRLINE
3.8V≤VIN≤6V
IOUT=30mA
4
16
mV
IOUT=10mA
20
40
Dropout Voltage
VDROP
IOUT=100mA
150
300
IOUT=150mA
200
400
VIN=4.3V, IOUT=0mA
25
50
µA
VIN=4.3V
VCE in OFF mode
0.1
1
µA
Ripple 0.5Vp-p, f=10kHz
VIN=4.3V
70
dB
±330
µV/oC
±100
ppm/oC
50
mA
30
µVrms
Quiescent Current
IQ
Standby Current
ISTD
Power Supply
Rejection Ratio
PSRR
Output Voltage
Temperature Coefficient
Short Current Limit
RMS Output Noise
∆VOUT/∆T
(∆VOUT/VOUT)/∆T
ILIMIT
VNOISE
IOUT=30mA
VOUT=0V
o
TA=25 C
10Hz ≤f≤100kHz
CE "High" Voltage
CE input voltage "High"
CE "Low" Voltage
CE input voltage "Low"
CE Pull-down Resistance
RPD
1.5
2.5
Mar. 2007 Rev. 1. 4
mV
V
5
0.25
V
10
MΩ
BCD Semiconductor Manufacturing Limited
12
Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
Typical Performance Characteristics
3.5
1.5
3.0
Output Voltage (V)
Output Voltage (V)
1.2
0.9
0.6
AP2121-1.5
VIN=2V
VIN=2.5V
0.3
AP2121-3.0
VIN=3.3V
2.5
VIN=4V
2.0
VIN=6V
1.5
1.0
0.5
VIN=3V
0.0
0.0
0
50
100
150
200
250
300
0
350
50
100
150
200
250
300
350
Output Current (mA)
Output Current (mA)
Figure 5. Output Voltage vs. Output Current
Figure 4. Output Voltage vs. Output Current
3.50
1.50
3.25
Output Voltage (V)
Output Voltage (V)
1.25
1.00
0.75
0.50
AP2121-1.5
IOUT=30mA
0.25
3.00
2.75
2.50
AP2121-3.0
IOUT=30mA
2.25
2.00
0.00
0
1
2
3
4
5
6
0
7
1
2
3
4
5
6
7
Input Voltage (V)
Input Voltage (V)
Figure 6. Output Voltage vs. Input Voltage
Figure 7. Output Voltage vs. Input Voltage
Mar. 2007 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
13
Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
0.6
0.6
0.5
0.5
Dropout Voltage (V)
Dropout Voltage (V)
Typical Performance Characteristics (Continued)
0.4
0.3
Minimum Operating Requirement
0.2
0.1
0.4
0.3
0.2
0.1
AP2121-1.5
AP2121-3.0
0.0
0.0
0
40
80
120
160
0
200
40
80
3.10
1.58
3.08
1.56
3.06
1.54
3.04
Output Voltage (V)
Output Voltage (V)
1.60
1.52
1.50
1.48
1.44
AP2121-1.5
VIN=2.5V
1.42
IOUT=30mA
1.40
0
25
50
200
Figure 9. Dropout Voltage vs. Output Current
Figure 8. Dropout Voltage vs. Output Current
-25
160
Output Current (mA)
Output Current (mA)
1.46
120
75
100
3.02
3.00
2.98
2.96
2.94
AP2121-3.0
VIN=4V
2.92
IOUT=30mA
2.90
125
-25
0
25
50
75
100
125
o
o
Junction Temperature ( C)
Junction Temperature ( C)
Figure 10. Output Voltage vs. Junction Temperature
Figure 11. Output Voltage vs. Junction Temperature
Mar. 2007 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
14
Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
60
60
50
50
Supply Current (µA)
Supply Current (µA)
Typical Performance Characteristics (Continued)
40
30
20
AP2121-1.5
IOUT=0mA
10
40
30
20
AP2121-3.0
IOUT=0mA
10
0
0
0
1
2
3
4
5
6
0
7
1
2
Figure 12. Supply Current vs. Input Voltage
4
5
6
7
Figure 13. Supply Current vs. Input Voltage
40
40
35
35
30
30
Supply Current (µA)
Supply Current (µA)
3
Input Voltage (V)
Input Voltage (V)
25
20
15
AP2121-1.5
VIN=2.5V
10
20
15
AP2121-3.0
VIN=4V
10
IOUT=0mA
5
25
IOUT=0mA
5
0
0
-25
0
25
50
75
100
-25
125
0
25
50
75
100
125
o
o
Junction Temperature ( C)
Junction Temperature ( C)
Figure 14. Supply Current vs. Junction Temperature
Figure 15. Supply Current vs. Junction Temperature
Mar. 2007 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
15
Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
Typical Performance Characteristics (Continued)
3.5
2.5
0.05
0
-0.05
5
4
0.05
0
-0.05
Time (20µs/Div)
Time (40µs/Div)
Figure 17. Line Transient
(Conditions: IOUT=30mA, CIN=1µF, COUT=1µF)
VOUT (0.1V/Div)
AP2121-1.5
1.5
1.4
IOUT (100mA/Div)
IOUT (50mA/Div)
VOUT (0.1V/Div)
Figure 16. Line Transient
(Conditions: IOUT=30mA, CIN=1µF, COUT=1µF)
1.6
AP2121-3.0
6
VIN (1V/Div)
AP2121-1.5
∆VOUT (0.05V/Div)
∆VOUT (0.05V/Div)
VIN (1V/Div)
4.5
100
50
0
AP2121-3.0
3.1
3.0
2.9
200
100
0
Time (200µs/Div)
Time (200µs/Div)
Figure 19. Load Transient
(Conditions: VIN=4V, CIN=1µF, COUT=1µF)
Figure 18. Load Transient
(Conditions: VIN=2.5V, CIN=1µF, COUT=1µF)
Mar. 2007 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
16
Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
Typical Performance Characteristics (Continued)
100
100
80
80
IOUT=30mA
CIN=COUT=1µF
IOUT=30mA
CIN=COUT=1µF
70
PSRR (dB)
PSRR (dB)
AP2121-3.0
VIN=4V
90
AP2121-1.5
VIN=2.5V
60
40
60
50
40
30
20
20
10
0
10
100
1k
10k
100k
0
10
1M
100
1k
10k
Frequency (Hz)
Frequency (Hz)
Figure 20. PSRR vs. Frequency
Figure 21. PSRR vs. Frequency
Mar. 2007 Rev. 1. 4
100k
BCD Semiconductor Manufacturing Limited
17
Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
Typical Application
AP2121-1.5
VIN=2.5V
VIN
VIN
VOUT=1.5V
VOUT
VOUT
GND
COUT
1µF
CIN
1µF
AP2121-3.0
VIN=4V
VIN
VIN
VOUT=3V
VOUT
VOUT
GND
COUT
NC
CE
1µF
CIN
1µF
Note: Filter capacitors are required at the AP2121's input and output. 1µF capacitor is required at the input. The
minimum output capacitance required for stability should be more than 1µF with ESR from 0.01Ω to 100Ω.
Ceramic capacitors are recommended.
Figure 22. Typical Application of AP2121
Mar. 2007 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
18
Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
Mechanical Dimensions
SOT-23-3
Mar. 2007 Rev. 1. 4
Unit: mm(inch)
BCD Semiconductor Manufacturing Limited
19
Preliminary Datasheet
HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR
AP2121
Mechanical Dimensions (Continued)
SOT-23-5
Unit: mm(inch)
0.300(0.012)
0.600(0.024)
1.500(0.059)
1.700(0.067)
0.100(0.004)
0.200(0.008)
2.950(0.116)
2.650(0.104)
2.820(0.111)
3.020(0.119)
0.200(0.008)
0.700(0.028)
REF
0.300(0.012)
0.400(0.016)
0°
8°
1.800(0.071)
2.000(0.079)
1.250(0.049)
1.050(0.041)
0.950(0.037)
TYP
0.000(0.000)
0.100(0.004)
1.050(0.041)
1.150(0.045)
Mar. 2007 Rev. 1. 4
BCD Semiconductor Manufacturing Limited
20
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particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use
of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or
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