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MIC69151/153
Single Supply VIN, Low VIN, Low VOUT, 1.5A LDO
General Description
Features
The MIC69151/153 is the 1.5A output current member of * Single input voltage range: VIN: 1.65V to 5.5V the MIC69xxx family of high current, low voltage * Maximum dropout (VIN - VOUT) of 500mV regulators, which support currents of 1A, 1.5A, 3A, and 5A. over temperature The MIC69151/153 operates from a single low voltage * Adjustable output voltage down to 0.5V supply, yet offers high precision and ultra-low dropout of * Stable with 10F ceramic output capacitor 500mV under worst case conditions. * Excellent line and load regulation specifications The MIC69151/153 operates from an input voltage of * Logic controlled shutdown 1.65V to 5.5V. It is designed to drive digital circuits requiring low voltage at high currents (i.e. PLDs, DSP, * Thermal shutdown and current limit protection (R) microcontroller, etc.). These regulators are available in * 10-Pin 3mm x 3mm MLF package adjustable and fixed output voltages including 1.8V. The * EPAD SOIC-8 package adjustable version can support output voltages down to * Available -40C to +125C junction temperature 0.5V. The Cap design of the MIC69151/153 is optimized for stability with low value low-ESR ceramic output capacitors. Applications Features of the MIC69151/153 include thermal shutdown * Point-of-load applications and current limit protection. Logic enable and error flag * Industrial power pins are also available. * Sensitive RF applications The MIC69151/153 is offered in a tiny 10-pin 3mm x 3mm (R) MLF package and an EPAD SOIC-8 package. Both packages have an operating temperature range of -40C to +125C. Data sheets and support documentation can be found on Micrel's web site at: www.micrel.com. ___________________________________________________________________________________________________________
Typical Application
Fixed 1.8V Regulator w/Flag Error
Adjustable Regulator
Super eta PNP is a registered trademark of Micrel, Inc. Micrel Inc. * 2180 Fortune Drive * San Jose, CA 95131 * USA * tel +1 (408) 944-0800 * fax + 1 (408) 474-1000 * http://www.micrel.com
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MIC69151/153
Ordering Information
Part Number MIC69151-1.8YML MIC69151-1.8YME MIC69153YME MIC69153YML Nominal Output Voltage 1.8V 1.8V Adj. Adj. Junction Temperature Range -40 to +125C -40 to +125C -40 to +125C -40 to +125C Package 10-Pin 3x3 MLF
(R)
Lead Finish Pb-Free Pb Free Pb Free Pb-Free
8-Pin EPAD SOIC 8-Pin EPAD SOIC 10-Pin 3x3 MLF
(R)
Pin Configuration
FLG NC GND NC NC 1 2 3 4 5 10 ADJ/SNS 9 8 7 6
(R)
VOUT NC VIN EN
GND EN VIN VIN
1 2 3 4
8 FLG 7 SNS/ADJ 6 VOUT 5 VOUT
10-Pin 3mm x 3mm MLF (ML)
8-Pin EPAD SOIC (ME)
Pin Description
Pin Number MLF-10 Pin Number EPAD SOIC-8 Pin Name Pin Function
1 2, 4, 5, 8 3 (EP) 6 7 9 10 (Adj) 10 (Fixed)
8 - 1 2 3, 4 5, 6 7 (Adj) 7 (Fixed)
FLG NC GND EN VIN VOUT ADJ SNS
Error Flag (Output): Open collector output. Active low indicates an output fault condition. Not internally connected. Ground (exposed pad is recommended to connect to ground on MLF ). Enable (Input): CMOS compatible input. Logic high = enable, logic low = shutdown. Do not leave pin floating. Input voltage which supplies current to the output power device. Regulator Output. Adjustable regulator feedback input. Connect to resistor voltage divider. Sense pin, connect to output for improved voltage regulation.
(R)
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Absolute Maximum Ratings(1)
Supply Input Voltage (VIN) ................................................6V Logic Input Voltage (VEN, VLQ)................................ 0V to VIN (3) Power Dissipation (PD) ........................... Internally Limited Flag ..................................................................................6V Storage Temperature (TS)......................... -65C to +125C (4) ESD ............................................................................. 2kV
Operating Ratings(2)
Supply Voltage (VIN) ....................................... 1.65V to 5.5V Enable Input Voltage (VEN)..................................... 0V to VIN Junction Temperature (TJ) ..................-40C TJ +125C Package Thermal Resistance (R) 3x3 MLF (JA) ...................................................60C/W EPAD SOIC-8 (JA) ............................................41C/W
Electrical Characteristics(4)
TA = 25C with VIN = VOUT + 1V; bold values indicate -40C< TJ < +125C; IOUT = 10mA; COUT 4.7F ceramic, unless otherwise noted.
Parameter Output Voltage Accuracy (Fixed) Adjustable Feedback Voltage (Adj) Feedback Pin Current Output Voltage Line Regulation (Note 5) Conditions Over temperature range Min -2 0.49 Typ Max +2 0.51 Units % V
0.5 0.25 0.2 0.2 185 250 1.6 7.5 20 1 2.6 10 165 0.6
Output Voltage Load Regulation VIN - VO; Dropout Voltage (Note 6) Ground Pin Current
Ground Pin Current in Shutdown Current Limit Start-up Time Thermal Shutdown Enable Input Enable Input Threshold Enable Pin Input Current
Flag Output
VIN = VOUT +1.0V to 5.5V For VOUT 0.65V, VIN = 1.65 to 5.5V IL = 10mA to 1.5A IL = 1.0A IL = 1.5A IL = 10mA IL = 0.5A IL = 1.5A VEN = 0V VOUT = 0V VEN = VIN
1 0.3
A %/V % mV mV mA mA mA A A s C V V A A A mV
300 500 20 35
1.7
150
Regulator enable Regulator shutdown VIL 0.2V (Regulator shutdown) VIH 0.8V (Regulator enable) Flag Output Leakage Current (Flag Off) Output Logic-Low Voltage (undervoltage condition), IL = 5mA Threshold, % of VOUT below nominal (falling) Hysteresis
0.8
0.2
0.005 7 0.05 150 7.5 10 2 14
IFLG(LEAK) VFLG(LO) VFLG
Notes:
% %
1. Exceeding the absolute maximum rating may damage the device. 2. The device is not guaranteed to function outside its operating rating. 3. The maximum allowable power dissipation of any TA (ambient temperature) is (PD(max) = TJ(max) - TA) / JA. Exceeding the maximum allowable power dissipation will result in excessive die temperature and the regulator will go into thermal shutdown. 4. Specification for packaged product only. 5. Minimum input for line regulation test is set to VOUT + 1V relative to the highest output voltage. 6. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. For outputs below 1.65V, dropout voltage is considered the input-to-output voltage differential with the minimum input voltage of 1.65V. Minimum input operating voltage is 1.65V.
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Typical Characteristics
70 60 50 40 30 20 VIN = 3.3V 10 VOUT = 1.8V IOUT = 0.5A 0 1K 10K FREQUENCY (Hz)
Power Supply Rejection Ratio
300 250 200 150 100 50
Dropout Voltage vs. Output Current
400 350 300 250 200 150 100
Dropout Voltage vs. Temperature
IOUT=1.5A
IOUT=750mA VIN = 3.3V VOUT = 1.8V 20 40 60 80 TEMPERATURE (C)
0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 OUTPUT CURRENT (A)
VOUT = 1.8V COUT = 10F
50 0
18 16 14 12 10 8 6 4 2 0
Ground Current vs. Output Current
16 14 12 10 8 6
Ground Current vs. Temperature
2.0 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 0
Output Voltage vs. Input Voltage
1A
750mA 1A
VIN = 3V VOUT = 1.8V COUT = 10F 800 1200 OUTPUT CURRENT (mA)
0.5A 4 V =V IN OUT +1 2 VOUT = 1.8V COUT = 10F 0 20 40 60 80 TEMPERATURE (C)
VOUT = 1.8V COUT = 10F 0.5 1.0 1.5 2.0 2.5 INPUT VOLTAGE (V) 3.0
1.90 1.88 1.86 1.84 1.82 1.80 1.78 1.76 1.74 1.72 1.70
Output Voltage vs. Temperature
2.8 2.7 2.6 2.5 2.4 2.3 2.2
Current Limit vs. Temperature
Load Regulation
1.802 1.800 1.798 1.796 1.794 1.792 1.790
VIN = 3.3V VOUT = 1.8V IOUT = 10mA 20 40 60 80 TEMPERATURE (C)
2.1 2.0 1.9 1.8
VIN = 3.3V VOUT = 1.8V 20 40 60 80 TEMPERATURE (C)
VIN = 3V 1.788 VOUT = 1.8V COUT = 10F 1.786 0 0.25 0.5 0.75 1.0 1.25 1.5 OUTPUT CURRENT (A)
1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0
Enable Threshold vs. Temperature
ON
VIN = 2.8V VOUT = 1.8V COUT = 10F IOUT = 100mA
OFF
20 40 60 80 TEMPERATURE (C)
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MIC69151/153
Functional Characteristics
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Functional Diagram
IN OUT
EN
ENABLE
VREF ADJ
50mV VREF
FLG
GND
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Minimum Load Current The MIC69151/153 regulator is specified between finite loads. If the output current is too small, leakage currents dominate and the output voltage rises. A 10mA minimum load current is necessary for proper operation. Adjustable Regulator Design The MIC69153 adjustable version allows programming the output voltage anywhere between 0.5V and 5.5V with two resistors. The resistor value between VOUT and the adjust pin should not exceed 10k. Larger values can cause instability. The resistor values are calculated by:
Application Information
The MIC69151/153 is an ultra-high performance low dropout linear regulator designed for high current applications requiring a fast transient response. It utilizes a single input supply, perfect for low-voltage DC-to-DC conversion. The MIC69151/153 requires a minimum number of external components. The MIC69151/153 regulator is fully protected from damage due to fault conditions offering constant current limiting and thermal shutdown.
Input Supply Voltage VIN provides high current to the collector of the pass transistor. The minimum input voltage is 1.65V allowing conversion from low voltage supplies. Output Capacitor The MIC69151/153 requires a minimum of output capacitance to maintain stability. However, proper capacitor selection is important to ensure desired transient response. The MIC69151/153 is specifically designed to be stable with low ESR ceramic chip capacitors. A 10F ceramic chip capacitor should satisfy most applications. Output capacitor can be increased without bound. See typical characteristics for examples of load transient response. X7R dielectric ceramic capacitors are recommended because of their temperature performance. X7R-type capacitors change capacitance by only 15% over their operating temperature range and are the most stable type of ceramic capacitors. Z5U and Y5V dielectric 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.
R VOUT = 0.5 1 + 1 R 2 Where VOUT is the desired output voltage.
Enable The fixed output voltage versions of the MIC69151 feature an active high enable input (EN) that allows onoff control of the regulator. Current drain reduces to near "zero" when the device is shutdown, with only microamperes of leakage current. EN may be directly tied to VIN and pulled up to the maximum supply 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) * Ground current (IGND) First, calculate the power dissipation of the regulator from these numbers and the device parameters from this data sheet. PD = (VIN - VOUT) IOUT + VIN IGND where the ground current is approximated by using numbers from the "Electrical Characteristics" or "Typical Characteristics" sections. The maximum allowable power dissipation of any TA (ambient temperature) is PD(max) = (TJ(max) - TA) / JA. Exceeding the maximum allowable power dissipation will result in excessive die temperature and the regulator will go into thermal shutdown. Refer to "Application Note 9" for further details and examples on thermal design and heat sink applications.
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Package Information
10-Pin 3mm x 3mm MLF (ML)
(R)
8-Pin EPAD SOIC (ME)
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MIC69151/153
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) 2008 Micrel, Incorporated.
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