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Data Sheet

Dec. 2012 Rev. 2. 6 BCD Semiconductor Manufacturing Limited

HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121

General Description

The AP2121 series are positive voltage regulator ICs

fabricated by CMOS process. Each of these ICs con-

sists of a voltage reference, an error amplifier, a resis-

tor 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 supply voltage 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 1.2V, 1.3V, 1.5V, 1.8V, 2.5V,

2.8V, 2.85V, 3.0V, 3.2V and 3.3V versions.

The AP2121 are available in standard SOT-23-3, SOT-

23-5 and CSP-4 packages.

Features

· Low Dropout Voltage at I

OUT

=100mA: 150mV

Typical (Except 1.2V, 1.3V and 1.5V Versions)

· Low Standby Current: 0.1μA Typical

· Low Quiescent Current: 25μA Typical

· High Ripple Rejection: 70dB Typical （f=1kHz）

· Output Current: More Than 200mA (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 Equip-

ment

· Battery Powered Equipment

Figure 1. Package Types of AP2121

SOT-23-5SOT-23-3 CSP-4

Summary of content (29 pages)

PAGE 1
Data Sheet 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).
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Data Sheet HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121 Pin Configuration N Package (SOT-23-3) K Package (SOT-23-5) VIN 3 1 2 GND VOUT J4/J4A Package (CSP-4 (P 0.5)/CSP-4 (P 0.4)) Pin 1 Mark VIN 1 GND 2 CE 3 5 VOUT 4 NC J4C/J4B Package (CSP-4 (P 0.5)/CSP-4 (P 0.4)) CE VIN A1 A2 A1 A2 B1 B2 B1 B2 GND VOUT CE GND Pin 1 Mark VIN VOUT Figure 2.
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Data Sheet HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121 Functional Block Diagram VIN 3 2 VIN VOUT 1/A2/A1 5/B2/A2 VOUT VREF VREF CURRENT LIMIT CURRENT LIMIT 1 CE GND 3/A1/B1 2/B1/B2 GND SOT-23-5/CSP-4(J4/J4A)/CSP-4(J4C/J4B) SOT-23-3 Figure 3. Functional Block Diagram of AP2121 Dec. 2012 Rev. 2.
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Data Sheet HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121 Ordering Information AP2121 E1: Lead Free G1: Green Circuit Type TR: Tape and Reel A: Active High (Pull-down resistor built-in) Blank: No Enable Function 1.2: Fixed Output 1.2V 1.3: Fixed Output 1.3V 1.5: Fixed Output 1.5V 1.8: Fixed Output 1.8V 2.5: Fixed Output 2.5V 2.8: Fixed Output 2.8V 2.85: Fixed Output 2.85V 3.0: Fixed Output 3.0V 3.2: Fixed Output 3.2V 3.3: Fixed Output 3.3V Package N: SOT-23-3 K: SOT-23-5 J4: CSP-4(P 0.
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Data Sheet HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121 Ordering Information (Continued) Package CSP-4 CSP-4 Temperature Range Condition Part Number Lead Free Marking ID Green Lead Free Green Packing Type 0.4 Pitch AP2121AJ4A1.2TRG1 CB Tape & Reel 0.4 Pitch AP2121AJ4A1.3TRG1 CC Tape & Reel 0.4 Pitch AP2121AJ4A1.5TRG1 CD Tape & Reel 0.4 Pitch AP2121AJ4A1.8TRG1 CE Tape & Reel 0.4 Pitch AP2121AJ4A2.5TRG1 CF Tape & Reel 0.4 Pitch AP2121AJ4A2.8TRG1 CG Tape & Reel 0.
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Data Sheet HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121 Ordering Information (Continued) Package CSP-4 CSP-4 Temperature Range Condition Part Number Lead Free Marking ID Green Lead Free Green Packing Type 0.4 Pitch AP2121AJ4B1.2TRG1 DE Tape & Reel 0.4 Pitch AP2121AJ4B1.3TRG1 DF Tape & Reel 0.4 Pitch AP2121AJ4B1.5TRG1 DG Tape & Reel 0.4 Pitch AP2121AJ4B1.8TRG1 DH Tape & Reel 0.4 Pitch AP2121AJ4B2.5TRG1 EA Tape & Reel 0.4 Pitch AP2121AJ4B2.8TRG1 EB Tape & Reel 0.
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Data Sheet 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.
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Data Sheet HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121 Electrical Characteristics AP2121-1.2 Electrical Characteristics (VIN=2.2V, 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=2.2V 1mA≤IOUT≤30mA VIN-VOUT=1V Min Typ Max Unit 1.176 1.2 1.224 V 6 V 200 mA Load Regulation VRLOAD VIN=2.
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Data Sheet HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121 Electrical Characteristics (Continued) AP2121-1.3 Electrical Characteristics (VIN=2.3V, 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=2.3V 1mA≤IOUT≤30mA VIN-VOUT=1V Min Typ Max Unit 1.274 1.3 1.326 V 6 V 200 mA Load Regulation VRLOAD VIN=2.
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Data Sheet HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121 Electrical Characteristics (Continued) 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 200 mA Load Regulation VRLOAD VIN=2.
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Data Sheet 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 200 mA Load Regulation VRLOAD VIN=2.
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Data Sheet 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 200 mA Load Regulation VRLOAD VIN=3.
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Data Sheet 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 200 mA Load Regulation VRLOAD VIN=3.
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Data Sheet HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121 Electrical Characteristics (Continued) AP2121-2.85 Electrical Characteristics (VIN=3.85V, 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=3.85V 1mA≤IOUT≤30mA VIN-VOUT=1V Min Typ Max Unit 2.793 2.85 2.907 V 6 V 200 mA Load Regulation VRLOAD VIN=3.
PAGE 15
Data Sheet 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.
PAGE 16
Data Sheet 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 200 mA Load Regulation VRLOAD VIN=4.
PAGE 17
Data Sheet 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 200 mA Load Regulation VRLOAD VIN=4.
PAGE 18
Data Sheet HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121 Typical Performance Characteristics 1.8 1.4 1.6 1.2 0.8 Output Voltage (V) Output Voltage (V) 1.4 AP2121-1.2 VIN=2V VIN=2.5V VIN=3V 1.0 0.6 0.4 1.2 1.0 0.8 0.6 AP2121-1.5 VIN= 2V 0.4 0.2 0.2 0.0 0.0 0 0 50 100 150 200 250 300 VIN= 2.5V VIN= 4V 50 100 350 150 200 250 300 350 400 Output Current (mA) Output Current (mA) Figure 5. Output Voltage vs. Output Current Figure 4. Output Voltage vs.
PAGE 19
Data Sheet HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121 3.5 1.4 3.0 1.2 AP2121-3.0 VIN=3.3V 2.5 Output Voltage (V) Output Voltage (V) Typical Performance Characteristics (Continued) VIN=4V 2.0 VIN=6V 1.5 1.0 0.8 0.6 0.4 0.5 0.0 1.0 AP2121-1.2 IOUT=30mA 0.2 0 50 100 150 200 250 300 0.0 350 0 1 2 Output Current (mA) 3.50 0.6 3.25 0.5 3.00 2.75 2.50 2.00 AP2121-3.0 IOUT=30mA 1 2 3 4 5 6 7 0.4 0.3 5 6 Minimum Operating Requirement 0.2 0.1 0.
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Data Sheet HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121 Typical Performance Characteristics (Continued) 1.210 0.6 1.208 1.206 Output Voltage (V) Dropout Voltage (V) 0.5 0.4 0.3 0.2 0.1 1.204 1.202 1.200 1.198 1.196 AP2121-1.2 VIN=2.2V 1.194 AP2121-3.0 IOUT=30mA 1.192 0.0 0 40 80 120 160 1.190 200 -25 0 Output Current (mA) 25 50 75 100 125 o Junction Temperature ( C) Figure 12. Dropout Voltage vs. Output Current Figure 13. Output Voltage vs.
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Data Sheet HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121 Typical Performance Characteristics (Continued) 40 60 35 50 Supply Current (μA) Supply Current (μA) 30 40 30 20 0 0 1 2 3 4 5 20 15 AP2121-1.2 VIN=2.2V 10 AP2121-3.0 IOUT=0mA 10 25 IOUT=0mA 5 6 0 7 -25 Input Voltage (V) 0 25 50 75 100 125 o Junction Temperature ( C) Figure 16. Supply Current vs. Input Voltage Figure 17. Supply Current vs. Junction Temperature 40 VIN (1V/Div) 35 25 3.2 2.
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Data Sheet HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121 AP2121-3.0 6 VIN (1V/Div) 5 4 IOUT (100mA/Div) ΔVOUT (0.05V/Div) VOUT (0.1V/Div) Typical Performance Characteristics (Continued) 0.05 0 -0.05 AP2121-1.2 1.3 1.2 1.1 200 100 0 Time (200μs/Div) Time (20μs/Div) Figure 21. Load Transient (Conditions: VIN=2.2V, CIN=1μF, COUT=1μF) Figure 20. Line Transient (Conditions: IOUT=30mA, CIN=1μF, COUT=1μF) 3.1 3.0 2.9 PSRR (dB) IOUT (100mA/Div) VOUT (0.1V/Div) 100 AP2121-3.
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Data Sheet HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121 Typical Performance Characteristics (Continued) 100 AP2121-3.0 VIN=4V 90 80 IOUT=30mA CIN=COUT=1μF PSRR (dB) 70 60 50 40 30 20 10 0 10 100 1k 10k 100k Frequency (Hz) Figure 24. PSRR vs. Frequency Dec. 2012 Rev. 2.
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Data Sheet HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121 Typical Application AP2121-1.2 VIN=2.2V VIN VIN VOUT=1.2V VOUT GND VOUT COUT 1μF CIN 1μF VIN AP2121-3.0 VIN=4V 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.
PAGE 25
Data Sheet HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121 Mechanical Dimensions SOT-23-3 Unit: mm(inch) 2.820(0.111) 3.020(0.119) 1.800(0.071) 2.000(0.079) 0.200(0.008) 0 8 0.300(0.012) 0.500(0.020) 1.450(0.057) MAX. 0.950(0.037) TYP 0.300(0.012) 0.600(0.024) 2.650(0.104) 2.950(0.116) 1.500(0.059) 1.700(0.067) 0.100(0.004) 0.200(0.008) ° ° 0.000(0.000) 0.150(0.006) 0.900(0.035) 1.300(0.051) Dec. 2012 Rev. 2.
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Data Sheet 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) 0.000(0.000) MAX 1.450(0.057) 0.950(0.037) TYP 0.150(0.006) 0.900(0.035) 1.300(0.051) Dec. 2012 Rev. 2.
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Data Sheet HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121 Mechanical Dimensions (Continued) CSP-4 (P 0.4) Unit: mm(inch) 0. 960(0.038) 1. 060(0.042) 0.400(0.016) TYP. 0.400(0.016) TYP. 0.940(0.037) 1.040(0.041) 2 1 B Pin 1 Mark 0. 550(0.022) 0. 650(0.026) A Φ 0.270(0. 011) TYP. 0. 180(0. 007) 0. 220(0. 009) Dec. 2012 Rev. 2.
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Data Sheet HIGH SPEED, EXTREMELY LOW NOISE LDO REGULATOR AP2121 Mechanical Dimensions (Continued) CSP-4 (P 0.5) Unit: mm(inch) 0. 960(0.038) 1. 060(0.042) 0. 500(0.020) TYP. 0.500(0.020) TYP. 0.940(0.037) 1.040(0.041) 2 1 B Pin 1 Mark A Φ0.320(0. 013) TYP. 0. 600(0. 024) 0. 700(0. 028) 0.215(0. 008) 0.255(0. 010) Dec. 2012 Rev. 2.
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BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE IMPORTANT NOTICE BCD Semiconductor BCD Semiconductor Manufacturing Manufacturing Limited Limited reserves reserves the the right right to to make make changes changes without without further further notice notice to to any any products products or or specifispecifications herein. cations herein.