 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| AP138 300mA Low-Noise CMOS LDO Features - Very low dropout voltage - Low current consumption: Typ.30A, Max. 35A - Output voltage: 1.8V, 2.5V, 2.8V, 3.0V and 3.3V - High accuracy output voltage: 1.5% - Guaranteed 300mA output - Input range up to 7.0V - Thermal shutdown - Current limiting - Stability with low ESR capacitors - Factory pre-set output voltages - Low temperature coefficient - Pb-free package: SOT23-5L General Descriptions The AP138 is a positive voltage linear regulator utilizing CMOS technology. The features that include low quiescent current (30A typ.), low dropout voltage, and high output voltage accuracy, make it ideal for battery applications. EN input connected to CMOS has low bias current. The space-saving SOT23-5L package is attractive for "Pocket" and "Hand Held" applications. This rugged device has both thermal shutdown, and current limit protections to prevent device failure under the "Worst" operating conditions. In a low noise, regulated supply application, a 1000pF capacitor is necessary to be placed in between Bypass and Ground. The AP138 is stable with a low ESR output capacitor of 1.0F or greater. Applications - Battery-powered devices - Personal communication devices - Home electric/electronic appliances - PC peripherals Pin Assignments (Top View) VOUT BYP 5 4 Pin Descriptions Pin Name VIN GND EN BYP VOUT Pin No. 1 2 3 4 5 Function Power Supply Ground Enable Pin Bypass Signal Pin Output AP138 1 2 3 VIN GND EN SOT23-5 Ordering Information AP138 XX X X Output voltage 18: 1.8V 25: 2.5V 28: 2.8V 30: 3.0V 33: 3.3V Package W : SOT23-5L Packing Blank: Tube A: Taping This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. Rev. 1.0 Oct 29, 2004 1/7 AP138 300mA Low-Noise CMOS LDO Block Diagram VIN VOUT Current Limit 1uA Thermal Shutdown R1 EN BYP AMP + Vref R2 GND Absolute Maximum Ratings Symbol VCC IOUT VOUT TA TJ Parameter Input Voltage Output Current Output Voltage ESD Classification Ambient Temperature Range Junction Temperature Range Rating +7 PD/ (VIN-VO) GND - 0.3 to VIN+ 0.3 B -40 to +85 -40 to +125 Unit V mA V C C Thermal Information Symbol jc PD TJ TLead Parameter Thermal Resistance Internal Power Dissipation (T=100 C) Maximum Junction Temperature Maximum Lead Temperature (10 sec) SOT23-5L SOT23-5L Maximum 160 250 150 300 Unit C/W mW C C Anachip Corp. www.anachip.com.tw 2/7 Rev. 1.0 Oct 29, 2004 AP138 300mA Low-Noise CMOS LDO Electrical Characteristics (TA=+25C, unless otherwise noted.) Symbol Parameter Test Conditions VIN Input Voltage VOUT Output Voltage Accuracy IO=1mA to 300mA 1.2V Note 1. : VIN(MIN)=VOUT+VDROPOUT Min. Note 1 -1.5 300 300 -0.1 2 0 Typ. 450 30 30 0.02 0.2 150 30 40 60 50 40 75 55 30 30 20 30 20 2.0 2.0 - Max. 7 1.5 1300 800 300 35 50 0.1 1 3.0 0.1 3.0 VIN 0.4 Unit V % mV mA mA A A % % o C C o ppm/ oC dB dB Vrms Vrms A A A V V Typical Application IN VIN AP138 BYP C1 1uF C2 1nF GND EN C3 1uF VOUT OUT Anachip Corp. www.anachip.com.tw 3/7 Rev. 1.0 Oct 29, 2004 AP138 300mA Low-Noise CMOS LDO Typical Performance Characteristics Anachip Corp. www.anachip.com.tw 4/7 Rev. 1.0 Oct 29, 2004 AP138 300mA Low-Noise CMOS LDO Typical Performance Characteristics (Continued) Anachip Corp. www.anachip.com.tw 5/7 Rev. 1.0 Oct 29, 2004 AP138 300mA Low-Noise CMOS LDO Function Description The AP138 of CMOS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current protection, thermal shutdown. The P-channel pass transistor receives data from the error amplifier, over-current protection, and thermal protection circuits. During normal operation, the error amplifier compares the output voltage to a precision reference. Over-current and thermal shutdown circuits become active when the junction temperature exceeds 150oC, or the current exceeds 300mA. During thermal shutdown, the output voltage remains low. Normal operation is restored o when the junction temperature drops below 120 C. The AP138 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. Enable The enable pin normally floats high. When actively, pulled low, the PMOS pass transistor shut off, and all internal circuits are powered down. In this state, the quiescent current is less than 2A. This pin behaves much like an electronic switch. External Capacitor The AP138 is stable with a low ESR output capacitor to ground of 1.0F or greater. It can keep stable even with higher ESR capacitors. A second capacitor is recommended between the input and ground to stabilize VIN. The input capacitor should be larger than 0.1F to have a beneficial effect. All capacitors should be placed in close proximity to the pins. A "quiet" ground termination is desirable. Marking Information 5 4 X : Identification code (See Appendix) Y : Year: 0-9 W : Week: A~Z: 01~26 a~z : 27~52 . : 53 38 XYW 1 2 SOT23-5L 3 Appendix Identification Code D K N P S 7 Output version AP138-1.8V AP138-2.5V AP138-2.8V AP138-3.0V AP138-3.3V Anachip Corp. www.anachip.com.tw 6/7 Rev. 1.0 Oct 29, 2004 AP138 300mA Low-Noise CMOS LDO Package Information Package Type: SOT23-5L D e1 1(4x) 5 4 0.10 C 5x Seating Plane A1 2(4x) E1 E A A2 1 e 2 3 b With Plating b1 C C1 Gauge Plane 0.25 mm Base Metal b L L1 Symbol A A1 A2 b b1 c c1 D E E1 L L1 e e1 1 2 Dimensions In Millimeters Min. 1.05 0.05 1.00 0.25 0.25 0.08 0.08 2.70 2.60 1.50 0.35 Nom. 1.20 0.10 1.10 0.40 0.11 2.85 2.80 1.60 0.45 0.60 Ref. 0.95 Bsc. 1.90 Bsc. 0o 3o 6 o Dimensions In Inches Min. 0.041 0.002 0.039 0.010 0.010 0.003 0.003 0.106 0.102 0.059 0.014 Nom. 0.047 0.004 0.043 0.016 0.004 0.112 0.110 0.063 0.018 0.024 Ref. 0.037 Bsc. 0.075 Bsc. Max. 0.053 0.006 0.047 0.022 0.018 0.008 0.006 0.118 0.118 0.067 0.022 Max. 1.35 0.15 1.20 0.55 0.45 0.20 0.15 3.00 3.00 1.70 0.55 5o 5o 8 o 10o 7o 10 o 0o 3o 6 o 5o 5o 8 o 10o 7o 10o Anachip Corp. www.anachip.com.tw 7/7 Rev. 1.0 Oct 29, 2004 |
Price & Availability of AP138
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |