View MIC59300_4425612.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

MIC59300
Ultra High Speed 3A LDO
General Description
The MIC59300 is a high-bandwidth, low-dropout, 3A linear voltage regulator ideal for powering core voltages of lowpower microprocessors. The MIC59300 implements a dual supply configuration allowing for a very low output impedance and a very fast transient response. The MIC59300 requires a bias input supply and a main input supply, allowing for ultra-low input voltages on the main supply rail. The device operates from an input supply of 1.0V to 3.8V and bias supply between 3V and 5.5V. The MIC59300 offers fixed output voltages and adjustable output voltages down to 0.5V. The MIC59300 requires a minimum output capacitance for stability, working optimally with small ceramic capacitors. The MIC59300 is available in a 5-pin TO-263 and an 8-pin EPAD SOIC package and its junction temperature range is -40C to +125C. Data sheets and support documentation can be found on Micrel's web site at: www.micrel.com.
Features
* Input voltage range: - VIN = 1.0V to 3.8V - VBIAS = 3.0V to 5.5V * Stable with 1F ceramic capacitor * 1% initial tolerance * Maximum dropout voltage of 500mV over temperature * Adjustable output voltage down to 0.5V * Ultra fast transient response * Excellent line and load regulation specifications * Logic controlled shutdown option * Thermal shutdown and current limit protection * Junction temperature range: -40C to +125C * TO-263 & 8-pin EPAD SOIC * Pin Compatible Upgrade to MIC49300
Applications
* * * * * * * Telecommunications processors Graphics processors Computer peripheral cards Logic IC power supply SMPS post regulators Microprocessors Digital TV's
_________________________________________________________________________________________________________
Typical Application
MIC59300YME VIN
3, 6
CIN=1F (Ceramic)
2 1
VIN
VOUT
4, 5
VOUT R1
VBIAS EN CBIAS=1F (Ceramic)
VBIAS EN GND
8 9
ADJ EP
7
COUT=1F (Ceramic) R2
Micrel Inc. * 2180 Fortune Drive * San Jose, CA 95131 * USA * tel +1 (408) 944-0800 * fax + 1 (408) 474-1000 * http://www.micrel.com
January 2009
M9999-010809-A
Micrel, Inc.
MIC59300
Ordering Information
Part Number MIC59300-1.2YME MIC59300YME MIC59300-1.2WU MIC59300WU
Note: 1. Other Voltage available. Contact Micrel for detail.
Voltage(1) 1.2V Adj. 1.2V Adj.
Junction Temperature Range -40C to +125C -40C to +125C -40C to +125C -40C to +125C
Package 8-Pin EPAD SOIC 8-Pin EPAD SOIC 5-Pin TO-263 5-Pin TO-263
Lead Finish RoHS Compliant RoHS Compliant RoHS Compliant RoHS Compliant
Pin Configuration
8-Pin EPAD SOIC MIC59300YME
8-Pin EPAD SOIC MIC59300-1.2YME
VOUT VIN GND VBIAS ADJ
VOUT VIN GND VBIAS EN
5-Pin TO-263 MIC59300WU
5-Pin TO-263 MIC59300-1.2WU
January 2009
2
M9999-010809-A
Micrel, Inc.
MIC59300
Pin Description
Pin Number SOIC-8 1 2 3, 6 4, 5 7 (adjustable) 7 (fixed) 8 9 3 6 Pin Number TO-263 1 (fixed) 2 4 5 1 (adjustable) EN VBIAS VIN VOUT ADJ SENSE GND EP Enable (Input): CMOS compatible input. Logic high = enable, logic low = shutdown. Input bias voltage for powering all circuitry on the regulator with the exception of the output power device. Input voltage needed for the output power device. Regulator Output. Adjustable regulator feedback input. Connect to resistor voltage divider. Connect to VOUT for fixed voltage options. Ground. Exposed Pad: Connect to ground pin. Pin Name Pin Function
January 2009
3
M9999-010809-A
Micrel, Inc.
MIC59300
Absolute Maximum Ratings(1)
Supply Voltage (VIN) ........................................ -0.3V to +4V Bias Supply Voltage (VBIAS)............................. -0.3V to +6V Enable Input Voltage (VEN)............................. -0.3V to VBIAS Power Dissipation .....................................Internally Limited Storage Temperature (Ts) .........................-65C to +150C ESD Rating(3) .................................................................. 3kV
Operating Ratings(2)
Supply Voltage (VIN)............................................ 1V to 3.8V Bias Supply Voltage (VBIAS)................................. 3V to 5.5V Enable Input Voltage (VEN).................................. 0V to VBIAS Junction Temperature (TJ) ..................-40C TJ +125C Package Thermal Resistance EPAD SOIC (JA) ...............................................41C/W TO-263 (JC)....................................... ......6.3C/W
Electrical Characteristics(4)
TA = 25C with VBIAS = VOUT + 2.2V; VIN = VOUT + 1V; ILOAD = 10mA; bold values indicate 0C TJ 85C, unless otherwise specified.
Parameter Output Voltage Accuracy (Fixed Voltage Options) Line Regulation (VIN) Line Regulation (VBIAS) Feedback Voltage (Adjustable Output Voltage) Output Voltage Load Regulation VIN - VOUT; Dropout Voltage Condition Room temperature Over temperature range VIN = VOUT + 1V to 3.8V VBIAS = 3V to 5.5V (VOUT < 0.8V) VBIAS = VOUT + 2.2V to 5.5V (VOUT 0.8V) Room temperature Over temperature range IL = 10mA to 3A (SOIC) IL = 10mA to 3A (TO-263) IL = 1.5A IL = 3A (SOIC) IL = 3A (TO-263) VBIAS - VOUT; Dropout Voltage VBIAS supply current VBIAS shutdown current VIN shutdown current FB bias current UVLO Current Limit Enable Input Enable Input Threshold Enable Pin Input Current AC Response Large signal bandwidth PSRR (BIAS) at 10kHz PSRR (IN) at 10kHz Thermal Shutdown VBIAS = 3.3V, IOUT = 1.5A VIN = VOUT + 1V, IOUT = 1.5A VIN = VOUT + 0.3V, IOUT = 1.5A 1 45 65 55 145 MHz dB dB dB C Regulator enable Regulator shutdown Independent of state 1.6 0.85 0.75 0.002 0.3 1 V V A IL = 3A VEN = 2V, IL = 100mA VEN = 2V, IL = 3A VEN = 0V VEN = 0V Adj only VBIAS rising Hysteresis VOUT = 0V 3.3 2.7 0.495 0.490 Min 1 2 0.0015 0.035 0.5 0.5 0.15 0.15 93 205 205 0.91 2 30 0.1 0.1 0.02 2.85 100 4.7 9.0 Typ Max 1 2 0.1 0.3 0.505 0.510 0.5 0.5 250 400 500 2.1 7.5 150 1 1 1 3.0 Units % % %/V %/V V V % % mV mV mV V mA mA A A A V mV A
January 2009
4
M9999-010809-A
Micrel, Inc.
Thermal Shutdown Hysteresis Turn-on Time
Notes: 1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating. 3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. 4. Specification for packaged product only.
MIC59300
10 90 300 C s
January 2009
5
M9999-010809-A
Micrel, Inc.
MIC59300
Typical Characteristics
90 80 70 PSRR (dB) 50 40 30 VBIAS = 3.3V 20 10
VIN = 1.8V VOUT = 1V IOUT = 1.5A
Power Supply Rejection Ratio (VIN)
90 80 70 PSRR (dB) 60 50 40
Power Supply Rejection Ratio (VBIAS)
DROPOUT VOLTAGE (mV)
60
30 VBIAS = 3.3V 20 10
VIN = 1.8V VOUT = 1V IOUT = 1.5A
0 0.01
0.1 1 10 100 FREQUENCY (kHz)
1000
0 0.01
0.1 1 10 100 FREQUENCY (kHz)
1000
220 200 180 160 140 120 100 80 60 40 20 0 1.5
Dropout Voltage (VIN)
VBIAS = 3.3V VOUT = 1V
1.8 2.1 2.4 2.7 OUTPUT CURRENT (A)
3
1.2 DROPOUT VOLTAGE (V) 1 0.8 0.6 0.4 0.2 0
Dropout Voltage (VBIAS)
DROPOUT VOLTAGE (mV)
350 300 250 200 150 100 50
Dropout Voltage vs. Temperature (VIN)
DROPOUT VOLTAGE (V)
1.2 1 0.8 0.6 0.4 0.2
Dropout Voltage vs. Temperature (VBIAS)
VBIAS = 5.5V VOUT = 3.45V IOUT = 3A
VIN = 3V VOUT = 2.5V
VIN = 3.8V VOUT = 3.45V IOUT = 3A
20
40
60
80
20
40
60
-40
-20
-40
-20
100
120
80
0
0
100
100
OUTPUT CURRENT (A)
TEMPERATURE (C)
TEMPERATURE (C)
3 OUTPUT VOLTAGE (V) 2.5 2 1.5 1 0.5 0 0
Dropout Characteristics (VBIAS)
OUTPUT VOLTAGE (V)
10mA 3A
Load Regulation
1.010 1.009 1.008 1.007 1.006 1.005 1.004 1.003 1.002 1.001 1.000 0.999 0.998 0.997 0.996 0.995
70 BIAS CURRENT (mA) 60 50 40 30 20
Bias Current vs. Temperature
VBIAS = 3V I
OUT
=3.0A
VIN = 1.5V VOUT = 0.5V
I
OUT
=1.5A
VIN = 3V VOUT = 2.5V
VBIAS = 3.3V VIN = 1.5V VOUT = 1V
10 IOUT=100mA 0 20 40 60 -40 -20 80 120 0
0.3
0.6
0.9
1.2
1.5
1.8
2.1
2.4
OUTPUT CURRENT (A)
2.7
1
2 3 4 BIAS VOLTAGE (V)
5
0
3
TEMPERATURE (C)
35
BIAS CURRENT (mA)
Bias Current vs. Output Current
GROUND CURRENT (mA)
1.5 1.4 1.3 1.2 1.1 1 0.9 3
Ground Current vs. Bias Voltage
FEEDBACK VOLTAGE (V)
0.504 0.503 0.502 0.501 0.500 0.499 0.498 0.497 0.496 1.5
Feedback Voltage vs. Input Voltage
30 25 20 15 10 5 0
VBIAS = 3V VIN = 1.5V VOUT = 0.5V
VIN = 1.8V VOUT = 1V
VBIAS = 3.3V VOUT = 1V
OUTPUT CURRENT (A)
3.5 4 4.5 5 BIAS VOLTAGE (V)
5.5
1.9 2.3 2.7 3.1 3.5 INPUT VOLTAGE (V)
January 2009
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3
3.9
6
M9999-010809-A
120
0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3
0
0
Micrel, Inc.
MIC59300
Typical Characteristics (continued)
0.505
FEEDBACK VOLTAGE (V)
Feedback Voltage vs. Bias Voltage
FEEDBACK VOLTAGE (V)
0.51 0.508 0.506 0.504 0.502 0.5 0.498 0.496 0.494 0.492 0.49
Feedback Voltage vs. Temperature
ENABLE THRESHOLD (V)
1.2 1 0.8 0.6 0.4 0.2 0 3
Enable Threshold vs. Bias Voltage
0.504 0.503 0.502 0.501 0.500 0.499 0.498 0.497 0.496 0.495 3
VIN = 1.5V VOUT = 1V
VBIAS = 3.3V VIN = 1.5V
VIN = 1.8V VOUT = 1V
-40
-20
0
20
40
60
80
100
3.5 4 4.5 5 BIAS VOLTAGE (V)
5.5
120
TEMPERATURE (C)
3.5 4 4.5 5 BIAS VOLTAGE (V)
5.5
January 2009
7
M9999-010809-A
Micrel, Inc.
MIC59300
Functional Characteristics
January 2009
8
M9999-010809-A
Micrel, Inc.
MIC59300
Functional Diagram
VBIAS VIN
EN
Enable
Bandgap
ADJ Ilimit VOUT
MIC59300 (Adj) Block Diagram
VBIAS VIN
EN
Enable
Bandgap
SENSE
R1 R2 Ilimit
VOUT
MIC59300 (Fixed) Block Diagram
January 2009
9
M9999-010809-A
Micrel, Inc.
MIC59300 capacitors change value by as much as 50% and 60% respectively over their operating temperature ranges. To use a ceramic chip capacitor with Y5V dielectric, the value must be much higher than an X7R ceramic or a tantalum capacitor to ensure the same capacitance value over the operating temperature range. Tantalum capacitors have a very stable dielectric (10% over their operating temperature range) and can also be used with this device. Input Capacitor An input capacitor of 1F or greater is recommended when the device is more than 4 inches away from the bulk supply capacitance, or when the supply is a battery. Small, surface-mount, ceramic chip capacitors can be used for the bypassing. The capacitor should be placed within 1 inch of the device for optimal performance. Larger values will help to improve ripple rejection by bypassing the input to the regulator, further improving the integrity of the output voltage. Thermal Design Linear regulators are simple to use. The most complicated design parameters to consider are thermal characteristics. Thermal design requires the following application-specific parameters: * Maximum ambient temperature (TA) * * * Output current (IOUT) Output voltage (VOUT) Input voltage (VIN)
Application Information
The MIC59300 is an ultra-high performance, low-dropout linear regulator designed for high current applications requiring a fast transient response. The MIC59300 utilizes two input supplies, significantly reducing dropout voltage, making it perfect for low-voltage, DC-to-DC conversion. The MIC59300 requires a minimum number of external components, and as a Cap regulator, the output is tolerant of virtually any type of capacitor, including ceramic type and tantalum type capacitors. The MIC59300 regulator is fully protected from damage due to fault conditions, offering linear current limiting and thermal shutdown. Bias Supply Voltage VBIAS, requiring relatively light current, provides power to the control portion of the MIC59300. VBIAS requires approximately 30mA for a 3A load current. Dropout conditions require higher currents. Most of the biasing current is used to supply the base current to the pass transistor. The bias voltage allows the pass element to be driven into saturation, reducing the dropout to 205mV at a 3A load current. Bypassing on the bias pin is recommended to improve performance of the regulator during line and load transients. Small ceramic capacitors from VBIAS-to-ground help reduce high frequency noise from being injected into the control circuitry from the bias rail and constitute good design practice. Good bypass techniques typically include one larger capacitor such as 1F ceramic and smaller valued capacitors such as 0.01F or 0.001F in parallel with that larger capacitor to decouple the bias supply. The VBIAS input voltage must be 2.1V above the output voltage with a minimum VBIAS input voltage of 3V. Input Supply Voltage VIN provides the high current to the collector of the pass transistor. The minimum input voltage is 1.0V, allowing conversion from low voltage supplies. Output Capacitor The MIC59300 requires a minimum of output capacitance to maintain stability. However, proper capacitor selection is important to ensure desired transient response. The MIC59300 is specifically designed to be stable with virtually any capacitance value and ESR. A 1F ceramic chip capacitor should satisfy most applications. Output capacitance can be increased without bound. See the "Functional Characteristics" for examples of load transient response. X7R dielectric ceramic capacitors are recommended because of their temperature performance. X7R-type capacitors change capacitance by 15% over their operating temperature range and are the most stable type of ceramic capacitors. Z5U and Y5V dielectric January 2009 10
* Ground current (IGND) First, calculate the power dissipation (PD) of the regulator from these numbers and the device parameters from this datasheet.
PD = VIN x I IN + VBIAS x I BIAS - VOUT x I OUT
The input current will be less than the output current at high output currents as the load increases. The bias current is a sum of base drive and ground current. Ground current is constant over load current. Then the heat sink thermal resistance is determined with this formula:
SA =
TJ ( MAX ) - T A - ( JC + CS ) PD
The heat sink may be significantly reduced in applications where the maximum input voltage is known and large compared with the dropout voltage. Use a series input resistor to drop excessive voltage and distribute the heat between this resistor and the regulator. The low-dropout properties of the MIC59300 allow significant reductions in regulator power dissipation and the associated heat sink without compromising performance. When this technique is employed, a
M9999-010809-A
Micrel, Inc. capacitor of at least 1F is needed directly between the input and regulator ground. Refer to "Application Note 9" (http://www.micrel.com/_PDF/App-Notes/an-9.pdf) for further details and examples on thermal design and heat sink specification. Minimum Load Current The MIC59300, unlike most other high current regulators, does not require a minimum load to maintain output voltage regulation. Adjustable Regulator Design The MIC59300 adjustable version allows programming the output voltage anywhere between 0.5Vand 3.3V. Two resistors are used. The resistor value between VOUT and the adjust pin should not exceed 10k. Larger values can cause instability. The resistor values are calculated by:
MIC59300
V R 1 = R 2 x OUT - 1 0.5
where VOUT is the desired output voltage. Enable An active high enable input (EN) allows on-off control of the regulator. Current drain reduces to "zero" when the device is shutdown, with only microamperes of leakage current. The EN input has CMOS compatible thresholds for simple logic interfacing. EN may be directly tied to VBIAS and pulled up to the maximum supply voltage. EPad The exposed pad on the bottom of the SOIC part must be connected to ground.
January 2009
11
M9999-010809-A
Micrel, Inc.
MIC59300
J1 VIN 1V to 3.8V J2 GND J3 VBIAS 3V to 5.5V
U1 MIC59300YME C1 1uF/6.3V
3 6
VIN VIN
VOUT VOUT
4 5
J4 VOUT R1 1K C3 1uF/6.3V J5 GND
Option for Fixed VOUT R1 = 0 Remove all Jumpers from JP2
C4 OPEN
C2 1uF/6.3V
1
2
VBIAS EN GND
8
ADJ EP
7
JP1
3
2
1
9
R2 1K A 2 JP2
R3 698 B 4
R4 499 C 6
R5 383 D 8 7
JP2 = Voltages Selector A VOUT = 1.0V B VOUT = 1.2V C VOUT = 1.5V D VOUT = 1.8V
1
3
Bill of Materials
Item C1,C2 C3 C4 R1,R2 R3 R4 R5 U1
Notes:
1. TDK: www.tdk.com 2. Murata Tel: www.murata.com 3. AVX Tel: www.avx.com 4. Vishay Tel: www.vishay.com 5. Micrel, Inc.: www.micrel.com
Part Number C1608X5R0J105K GRM188R60J105KA01D 0603D105KAT2A CRCW06031K00FKXX CRCW0603698RFKXX CRCW0603499RFKXX CRCW0603383RFKXX MIC59300YME
Manufacturer TDK
(1)
5
Description 1uF Ceramic Capacitor X5R 0603 6.3V
Qty. 3
Murata(2) AVX(3) Open Vishay
(4)
1 2 1 1 1 1
1k 1% 0603 Resistor 698 1% 0603 Resistor 499 1% 0603 Resistor 383 1% 0603 Resistor Ultra High Speed 3A LDO
Vishay(4) Vishay(4) Vishay
(4)
Micrel, Inc.(5)
January 2009
12
M9999-010809-A
Micrel, Inc.
MIC59300
PCB Layout Recommendations
Top Layer
Bottom Layer
January 2009
13
M9999-010809-A
Micrel, Inc.
MIC59300
Package Information
8-Pin EPAD SOIC (ME)
January 2009
14
M9999-010809-A
Micrel, Inc.
MIC59300
5-Pin TO-263 (WU)
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser's use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser's own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. (c) 2009 Micrel, Incorporated.
January 2009
15
M9999-010809-A

▲Up To Search▲

Price & Availability of MIC59300

	To Download MIC59300 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .