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MIC5322
Dual, High Performance 150mA Cap ULDOTM
General Description
The MIC5322 is a tiny Dual Ultra Low-Dropout (ULDOTM) linear regulator ideally suited for those applications that require high Power Supply Rejection Ratio (PSRR). It provides a bypass pin to increase PSRR for noise sensitive portable electronics. The MIC5322 integrates two high-performance; 150mA ULDOs into a very compact 1.6mm x 1.6mm leadless Thin MLF(R) package with exceptional thermal package characteristics. The MIC5322 is a Cap design which enables operation with very small ceramic output capacitors for stability, thereby reducing required board space and component cost. The combination of extremely low-drop-out voltage, very high power supply rejection, very low output noise and exceptional thermal package characteristics makes it ideal for powering RF applications, cellular phones, GPS, imaging sensors for digital still cameras, PDAs, MP3 players and other portable applications. The MIC5322 ULDOTM is available in fixed-output voltages in a tiny 6-pin 1.6mm x 1.6mm leadless Thin MLF(R) package which is only 2.56mm2 in area, - 30% less area than the SOT-23, TSOP and MLF(R) 3x3 packages. Additional voltage options are available. For more information, contact Micrel marketing department. Data sheets and support documentation can be found on Micrel's web site at: www.micrel.com.
Features
* 2.3V to 5.5V input voltage range * Ultra-low dropout voltage ULDOTM 35mV @ 150mA * Tiny 6-pin 1.6mm x 1.6mm Thin MLF(R) leadless package * Bypass pin for improved noise performance * High PSRR - >75dB on each LDO * Ultra low noise output - > 30Vrms * Dual 150mA outputs * Cap stable with 1F ceramic capacitor * Low quiescent current - 150A * Fast turn-on time - 45s * Thermal shutdown protection * Current Limit protection
Applications
* * * * * * Mobile phones GPS receivers Portable media players Digital still and video cameras PDAs Portable electronics
Typical Application
MIC5322-x.xYMT VIN VOUT 1 VOUT 2 1F EN BYP 0.01F GND 1F 1F GPS Module RF Core
RF Power Supply Circuit
ULDO is a trademark of Micrel, Inc. MLF and MicroLeadFrame are registered trademarks of Amkor Technology, 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
March 2008
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Micrel, Inc.
MIC5322
Ordering Information
Part number MIC5322-2.8/1.5YMT MIC5322-2.8/1.8YMT MIC5322-2.85/2.85YMT MIC5322-3.0/2.8YMT MIC5322-3.0/2.85YMT MIC5322-3.0/3.0YMT
Notes: 1. Pin 1 identifier = 2. For other voltage options. Contact Micrel Marketing for details.
Manufacturing Part Number MIC5322-MFYMT MIC5322-MGYMT MIC5322-NNYMT MIC5322-PMYMT MIC5322-PNYMT MIC5322-PPYMT
Marking VMF VMG VNN VPM VPN VPP
(1)
Voltage(2) 2.8V/1.5V 2.8V/1.8V 2.85V/2.85V 3.0V/2.8V 3.0V/2.85V 3.0V/3.0V
Junction Temp. Range -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C
Package 6-Pin 1.6x1.6 Thin MLF(R) 6-Pin 1.6x1.6 Thin MLF(R) 6-Pin 1.6x1.6 Thin MLF(R) 6-Pin 1.6x1.6 Thin MLF(R) 6-Pin 1.6x1.6 Thin MLF(R) 6-Pin 1.6x1.6 Thin MLF(R)
Pin Configuration
VIN 1 GND 2 BYP 3
6 5 4
VOUT1 VOUT2 EN
6-Pin 1.6mm x 1.6mm Thin MLF(R) (MT) Top View
Pin Description
Pin Number Thin MLF-6
1 2 3 4 5 6
Pin Name
VIN GND BYP /EN VOUT2 VOUT1
Pin Function
Supply Input. Ground Reference Bypass: Connect external 0.01F to GND to reduce output noise. May be left open. Enable Input (both regulators): Active Low Input. Logic High = OFF; Logic Low = ON; Do not leave floating. Regulator Output - LDO2 Regulator Output - LDO1
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Absolute Maximum Ratings(1)
Supply Voltage (VIN) .....................................0V to +6V Enable Input Voltage (V/EN) ..........................0V to +6V Power Dissipation......................Internally Limited(3) Lead Temperature (soldering, 3sec) ..................260C Storage Temperature (TS) ................ -65C to +150C ESD Rating(4) .........................................................2kV
Operating Ratings(2)
Supply Voltage (VIN).............................. +2.3V to +5.5V Enable Input Voltage (V/EN) ............................. 0V to VIN Junction Temperature (TJ) ................. -40C to +125C Junction Thermal Resistance 6-pin 1.6mmx1.6mm Thin MLF(R) (JA) .... 100C/W
Electrical Characteristics(5)
VIN = VOUT + 1.0V; higher of the two regulator outputs, IOUTLDO1 = IOUTLDO2 = 100A; V/EN = 0V; COUT1 = COUT2 = 1F; CBYP = 0.01F; TJ = 25C, bold values indicate -40C TJ +125C, unless noted.
Parameter
Output Voltage Accuracy Line Regulation Load Regulation Dropout Voltage
(6)
Conditions
Variation from nominal VOUT Variation from nominal VOUT; -40C to +125C VIN = VOUT + 1V to 5.5V; IOUT = 100A IOUT = 100A to 150mA IOUT = 100A IOUT = 50mA IOUT = 100mA IOUT = 150mA
Min
-2.0
Typ
Max
+2.0
Units
% % %/V %/V % mV mV mV mV A A dB dB
-3.0
0.02 0.5 0.1 12 25 35 150 0.01 75 45
+3.0
0.3 0.6
2.0 50 75 100 190
2
Ground Current Ground Current in Shutdown Ripple Rejection Current Limit Output Voltage Noise
V/EN = Low; IOUT1 = 150mA; IOUT2 = 150mA V/EN = High f = 1kHz; COUT = 1.0F; CBYP = 0.1F f = 20kHz; COUT = 1.0F; CBYP = 0.1F VOUT = 0V COUT = 1.0F; CBYP = 0.01F; 10Hz to 100kHz Logic Low Logic High
300
550 30
950
mA VRMS
Enable Inputs (/EN)
Enable Input Voltage Enable Input Current
0.2 1.2
0.01 0.01 40 45 1 1
V V A A s s
VIL 0.2V VIH 1.2V
Turn-on Time (See Timing Diagram)
Turn-on Time (LDO1 and 2)
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. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF. 5. Specification for packaged product only. 6. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below it's nominal VOUT. For outputs below 2.3V, the dropout voltage is the input-to-output differential with the minimum input voltage 2.3V
COUT = 1.0F; No CBYP COUT = 1.0F; CBYP = 0.01F
100 100
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Functional Diagram
VIN
LDO1
VOUT 1
LDO2 EN Enable
VOUT 2
BYP
Reference
GND
MIC5322 Block Diagram
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Typical Characteristics
-90 -80 -70 -60 -50 -40 -30 VIN = VOUT +1V VOUT = 2.8V 150mA -20 COUT = 1F CBYP = 0.1F -10 /EN = Low 0 0.1 1 10 100 1,000 FREQUENCY (kHz) 50mA
Power Supply Rejection Ratio
40 35 30 25 20 15 10 5 0 0
Dropout Voltage vs. Output Current
50 VOUT = 2.8V 45 COUT = 1F 40 /EN = Low 35 30 25 20 15 10 5 0
Dropout Voltage vs. Temperature
150mA
100mA
50mA 10mA 100A
VOUT = 2.8V COUT = 1F /EN = Low 25 50 75 100 125 150 OUTPUT CURRENT (mA)
20 40 60 80 TEMPERATURE (C)
160 155 150 145 140 135 130 125 120
Ground Current vs. Temperature
160 155
Ground Current vs. Temperature
162 158
Ground Current vs. Output Current
100A
150 145 140 135
150mA
154 150
VIN = VOUT + 1V VOUT = 3V COUT = 1F /EN = Low 20 40 60 80 TEMPERATURE (C)
130 125 120
VIN = VOUT + 1V VOUT = 3V COUT = 1F /EN = Low 20 40 60 80 TEMPERATURE (C)
146 142 138 0
VIN = VOUT + 1V VOUT = 2.85V /EN = Low COUT1 = COUT2 = 1F 25 50 75 100 125 150 OUTPUT CURRENT (mA)
3.00 2.95 2.90 2.85 2.80 2.75 2.70 2.65 2.60 2.55 2.50
Output Voltage vs. Temperature
3.0 2.5 2.0 1.5
Output Voltage vs. Input Voltage
2.8V
2.90
Output Voltage vs. Output Current
2.85
1.5V
2.80 2.75 VIN = VOUT + 1V VOUT = 2.8V COUT1 = COUT2 = 1F /EN = Low 2.70 0 25 50 75 100 125 150 OUTPUT CURRENT (mA)
VIN = VOUT + 1V VOUT = 2.8V COUT = 1F /EN = Low 20 40 60 80 TEMPERATURE (C)
1.0 0.5 0.0 0 1 IOUT = 100A COUT = 1F /EN = Low 2 3 4 5 INPUT VOLTAGE (V) 6
1.60
Output Voltage vs. Output Current
610 600 590 580 570 560 550 540 530 520 510 3
Current Limit vs. Input Voltage
10
Output Noise Spectral Density
1.55
1
1.50 1.45 VIN = VOUT + 1V VOUT = 1.5V COUT1 = COUT2 = 1F /EN = Low 1.40 0 25 50 75 100 125 150 OUTPUT CURRENT (mA)
0.1 VIN = 3.8V 0.01 VOUT = 2.8V COUT = 1F CBYP = 0.01F /EN = Low 0.001 0.01 0.1 1 10 100 1,000 10,000 FREQUENCY (kHz)
/EN = Low COUT = 1F 3.5 4 4.5 5 INPUT VOLTAGE (V) 5.5
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Functional Characteristics
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Applications Information
/Enable/Shutdown The MIC5322 comes with a single active-low enable pin that allows both regulators to be disabled simultaneously. Forcing the enable pin high disables the regulators and sends it into a "zero" off-modecurrent state. In this state, current consumed by the regulator goes nearly to zero. Forcing the enable pin low enables the output voltages. The active-low enable pin cannot be left floating since a floating enable pin may cause an indeterminate state on the output. Input Capacitor The MIC5322 is a high-performance, high bandwidth device. Therefore optimal performance can be achieved by providing a well-bypassed input supply. A 1F capacitor is required from the input-to-ground to provide stability. Low-ESR ceramic capacitors provide optimal performance at a minimum of space. Additional high-frequency capacitors, such as smallvalued NPO dielectric-type capacitors, help filter out high-frequency noise and are good practice in any RF-based circuit. Output Capacitor The MIC5322 requires an output capacitor of 1F or greater to maintain stability. The design is optimized, for use, with low-ESR ceramic chip capacitors. High ESR capacitors may cause high frequency oscillation. The output capacitor can be increased, but performance has been optimized for a 1F ceramic output capacitor and does not improve significantly with larger capacitance. X7R/X5R dielectric-type ceramic capacitors are recommended because of their temperature stable 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 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 capacitor to ensure the same minimum capacitance over the equivalent operating temperature range. Bypass Capacitor A capacitor can be placed from the noise bypass pinto-ground to reduce output voltage noise. The capacitor bypasses the internal reference. A 0.1F capacitor is recommended for applications that require low-noise outputs. The bypass capacitor can be increased, further reducing noise and improving PSRR. Turn-on time increases slightly with respect to bypass capacitance. A unique, quick-start circuit allows the MIC5322 to drive a large capacitor on the bypass pin without significantly slowing turn-on time. Refer to the Typical Characteristics section of this datasheet for performance with different bypass capacitors. No-Load Stability Unlike many other voltage regulators, the MIC5322 will remain stable and in regulation with no load. This is especially important in CMOS RAM keep-alive applications. Thermal Considerations The MIC5322 is designed to provide 150mA of continuous current for both outputs in a very small package. Maximum ambient operating temperature can be calculated based on the output current and the voltage drop across the part. As an example: Given that the input voltage is 3.3V, the output voltage is 2.8V for VOUT1, 1.5V for VOUT2 and the output current at 150mA. The actual power dissipation of the regulator circuit can be determined using the equation:
PD = (VIN - VOUT1) IOUT1 + (VIN - VOUT2) IOUT2+ VIN IGND Because this device is CMOS and the ground current is typically <150A over the load range, the power dissipation contributed by the ground current is < 1% and can be ignored for this calculation. PD = (3.3V - 2.8V) x 150mA + (3.3V -1.5) x 150mA PD = 0.345W To determine the maximum ambient operating temperature of the package, use the junction-toambient thermal resistance of the device and the following basic equation:
PD(MAX) =

TJ(MAX) - TA
JA
TJ(max) = 125C, the maximum junction temperature of the die JA thermal resistance = 100C/W. The table below shows junction-to-ambient thermal resistance for the MIC5322 in the Thin MLF(R) package.
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Package
6-Pin 1.6x1.6 Thin MLF
(R)
JA Recommended Minimum Footprint
100C/W
JC
2C/W
Thermal Resistance
Substituting PD for PD(max) and solving for the ambient operating temperature will give the maximum operating conditions for the regulator circuit. The junction-to-ambient thermal resistance for the minimum footprint is 100C/W. The maximum power dissipation must not be exceeded for proper operation.
For example, when operating the MIC5322-MFYMT at an input voltage of 3.3V and 150mA loads at each output with a minimum footprint layout, the maximum ambient operating temperature TA can be determined as follows: 0.345W = (125C - TA)/(100C/W) TA = 90.5C Therefore, a 2.8V/1.5V application with 150mA at each output current can accept an ambient operating temperature of 90.5C in a 1.6mm x 1.6mm Thin MLF(R) package. For a full discussion of heat sinking and thermal effects on voltage regulators, refer to the "Regulator Thermals" section of Micrel's Designing with Low-Dropout Voltage Regulators handbook. This information can be found on Micrel's website at: http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
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MIC5322
Package Information
6-Pin 1.6mm x 1.6mm Thin MLF (MT)
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) 2007 Micrel, Inc.
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