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MIC2212
Micrel
MIC2212
Dual Cap LDO and Power-On Reset
General Description
The MIC2212 is a dual Cap, low dropout regulator with power-on reset circuit. The first regulator is capable of sourcing 150mA, while the second regulator can source up to 300mA and includes a power-on reset function. Ideal for battery operated applications, the MIC2212 offers 1% accuracy, extremely low dropout voltage (80mV @ 100mA), and extremely low ground current, only 48A total. Equipped with TTL-logic-compatible enable pins, the MIC2212 can be put into a zero-off-mode current state, drawing no current when disabled. The MIC2212 is a Cap design, operating with very small ceramic output capacitors for stability, reducing required board space and component cost. The MIC2212 is available in fixed output voltages in the 10-pin 3mm x 3mm MLFTM leadless package.
Features
* Input voltage range: 2.25V to 5.5V * Stable with ceramic output capacitor * 2 LDO outputs * Output 1 - 150mA output current * Output 2 - 300mA output current * Power-on reset function with adjustable delay time * Low dropout voltage of 80mV @ 100mA * Ultra-low quiescent current of 48A * High output accuracy: * +1.0% initial accuracy * +2.0% over temperature * Thermal shutdown protection * Current limit protection * Tiny 10-pin 3mm x 3mm MLFTM package
Applications
* Cellular/PCS phones * Wireless modems * PDAs
Typical Application
MIC2212-xxBML VIN EN1 Li-Ion Battery EN2 CBYP SET GND VOUT1 VOUT2 POR VI/O VCORE /RST Baseband Processor COUT = 1F Ceramic
Sets delay for POR
MIC2212 Typical Cell Phone Application
MicroLeadFrame and MLF are trademarks of Amkor Technology.
Micrel, Inc. * 1849 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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Micrel
Ordering Information
Full Part Number MIC2212-1.8/2.8BML MIC2212-1.85/2.85BML MIC2212-1.85/2.9BML MIC2212-2.6/2.8BML MIC2212-2.6/2.85BML MIC2212-2.7/2.8BML MIC2212-2.7/2.9BML MIC2212-2.8/2.6BML MIC2212-2.8/2.8BML MIC2212-2.8/3.0BML MIC2212-3.0/2.8BML MIC2212-3.3/1.8BML MIC2212-3.3/2.8BML Manufacturing Part Number MIC2212-GMBML MIC2212-DNBML MIC2212-DOBML MIC2212-KMBML MIC2212-KNBML MIC2212-LMBML MIC2212-LOBML MIC2212-MKBML MIC2212-MMBML MIC2212-MPBML MIC2212-PMBML MIC2212-SGBML MIC2212-SMBML Voltage* (Vo1/Vo2) 1.8V/2.8V 1.85V/2.85V 1.85V/2.9V 2.6V/2.8V 2.6V/2.85V 2.7V/2.8V 2.7V/2.9V 2.8V/2.6V 2.8V/2.8V 2.8V/3.0V 3.0V/2.8V 3.3V/1.8V 3.3V/2.8V Junction Temp. Range -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C Package 10-Pin 3x3 MLFTM 10-Pin 3x3 MLFTM 10-Pin 3x3 MLFTM 10-Pin 3x3 MLFTM 10-Pin 3x3 MLFTM 10-Pin 3x3 MLFTM 10-Pin 3x3 MLFTM 10-Pin 3x3 MLFTM 10-Pin 3x3 MLFTM 10-Pin 3x3 MLFTM 10-Pin 3x3 MLFTM 10-Pin 3x3 MLFTM 10-Pin 3x3 MLFTM
* For other output voltage options, contact Micrel marketing.
Voltage Code Adj. A 1.5 F 1.6 W 1.8 G 1.85 D 1.9 Y 2.0 H 2.1 E 2.5 J 2.6 K 2.7 L 2.8 M 2.850 N 2.9 O 3.0 P 3.1 Q 3.2 R 3.3 S 3.4 T 3.5 U 3.6 V Table 1. Voltage Codes
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MIC2212
Micrel
Pin Configuration
VIN 1 EN1 2 EN2 3 BYP 4 SET 5
10 VOUT1 9 VOUT2 8 POR 7 NC 6 GND
10-Pin 3mm x 3mm MLFTM (ML) (Top View)
Pin Description
Pin Number MLF-10 (3x3) 1 2 3 4 5 Pin Name VIN EN1 EN2 CBYP SET Pin Function Supply Input: (VIN1 and VIN2 are internally tied together.) Enable Input to Regulator 1: Enables regulator 1 output. Active high input. High = on, low = off. Do not leave floating. Enable Input to Regulator 2: Enables regulator 2 output. Active high input. High = on, low = off. Do not leave floating. Reference Bypass: Connect external 0.01F to GND to reduce output noise. May be left open. Delay Set Input: Connect external capacitor to GND to set the internal delay for the POR output. When left open, there is no delay. This pin cannot be grounded. Ground: Connect externally to Exposed Pad. No Connection. Power-On Reset Output: Open-drain output. Active low indicates an output undervoltage condition on regulator 2. Output of Regulator 2: 300mA output current. Output of Regulator 1: 150mA output current. Ground: Internally connected to the Exposed Pad. Connect externally to pin 6 of the IC.
6 7 8 9 10 EP
GND NC POR VOUT2 VOUT1 GND
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Absolute Maximum Rating(1)
Supply Input Voltage (VIN) .................................... 0V to 7V Enable Input Voltage (VEN) ................................... 0V to 7V Power Dissipation (PD) ............... Internally Limited, Note 3 Junction Temperature .............................. -40C to +125C Storage Temperature (TS) ......................... -65C to 150C Lead Temperature (soldering, 5 sec.) ....................... 260C
Operating Ratings(2)
Supply Input Voltage (VIN) ............................ 2.25V to 5.5V Enable Input Voltage (VEN) .................................. 0V to Vin Junction Temperature (TJ) ....................... -40C to +125C Package Thermal Resistance MLFTM-10 (JA)1" square 2oz. copper ................. 60C/W
Electrical Characteristics(4)
VIN = VOUT +1.0V for higher output of the regulator pair; COUT = 1.0F, IOUT = 100A; TJ = 25C, bold values indicate -40C TJ +125C; unless noted. Parameter Output Voltage Accuracy Output Voltage Temp. Coefficient Line Regulation(5) VIN = VOUT +1V to 5.5V IOUT = 100A to 150mA (Regulator 1 and 2) IOUT = 100A to 300mA (Regulator 2) Dropout Voltage(6) IOUT = 150mA (Regulator 1 and 2) IOUT = 300mA (Regulator 2) Ground Pin Current IOUT1 = IOUT2 = 0A IOUT1 = 150mA and IOUT2 = 300mA Ground Pin Current in Shutdown Ripple Rejection VEN 0.4V f = 1kHz; COUT = 1.0F ceramic; CBYP = 10nF f = 20kHz; COUT = 1.0F ceramic; CBYP = 10nF Current Limit VOUT = 0V (Regulator 1) VOUT = 0V (Regulator 2) Output Voltage Noise Enable Input Enable Input Voltage Logic Low (Regulator Shutdown) Logic High (Regulator Enabled) Enable Input Current VIL < 0.6V (Regulator Shutdown) VIH > 1.8V (Regulator Enabled) POR Output VTH VOL IPOR Low Threshold, % of nominal VOUT2 (Flag ON) High Threshold, % of nominal VOUT2 (Flag OFF) POR Output Logic Low Voltage; IL = 250A Flag Leakage Current, Flag OFF -1 0.02 0.01 90 96 0.1 +1 % % V A 1.8 -1 -1 0.01 0.01 +1 +1 0.6 V V A A COUT =1F, CBYP = 0.01F, 10Hz to 100kHz 150 300 60 40 280 450 30 460 700 120 240 48 60 2.0 -0.3 -0.6 Conditions Variation from nominal VOUT Min -1.0 -2.0 40 0.02 0.2 0.3 0.6 1.0 1.5 190 250 340 420 65 80 Typ Max +1.0 +2.0 Units % % ppm/C %/V % % mV mV mV A A A A dB dB mA mA Vrms
Load Regulation
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Parameter SET Input SET Pin Current Source SET Pin Threshold Voltage
Notes 1. Exceeding maximum rating may damage the device. 2. The device is not guaranteed to work outside its operating rating.
Micrel
Conditions Min Typ Max Units A V
VSET = 0V POR = High
0.75
1.25 1.25
1.75
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 2.25V, dropout voltage is the input-to-output voltage differential with the minimum input voltage 2.25V. Minimum input operating voltage is 2.25V.
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Typical Characteristics
Spectral Noise Density Output 1
10E-6 100A Load
PSRR Output 1
80
CBYP = 100nF
PSRR Output 2
80
CBYP = 100nF
60
PSRR (dB)
CBYP = 10nF
60
PSRR (dB)
CBYP = 10nF
SPECTRAL NOISE DENSITY (V/root Hz)
1E-6
40
CBYP = 1nF
40
CBYP = 1nF
100E-9
20
VIN = VOUT + 1 IOUT = 150mA COUT = 1F
20
VIN = VOUT + 1 IOUT = 300mA COUT = 1F
COUT = 1F C = 1F
IN
CBYP = 0.01F 10E-9 10 1k 100 10k 100k FREQUENCY (Hz) 1M
0 0.01
0.1 1 10 100 FREQUENCY (kHz)
1000
0 0.01
0.1 1 10 100 FREQUENCY (kHz)
1000
SPECTRAL NOISE DENSITY (V/root Hz)
Spectral Noise Density Output 2
10E-6 100A Load 2.5
OUTPUT (V)
Dropout Characteristics Output 1
3 3 2.5 100A 150mA
OUTPUT (V)
Dropout Characteristics Output 2
1E-6
2 1.5 1 0.5 0 0
2 1.5 1 0.5
100A 300mA
100E-9
COUT = 1F C = 1F
IN
CBYP = 0.01F 10E-9 10 100 1k 10k 100k FREQUENCY (Hz) 1M 1 2 3 4 5 SUPPLY VOLTAGE (V) 0 0 1 2 3 4 5 SUPPLY VOLTAGE (V)
150
Dropout Voltage Output 1
DROPOUT VOLTAGE (mV)
150mA load
Dropout Voltage Output 2
350 300 250 200 150 100 50 0 -40 -20 0 20 40 60 80 100120140 TEMPERATURE (C) GROUND CURRENT (A) 300mA load
Ground Current vs. Supply Voltage
60 50 40 30 20 10 0 0 1 2 3 4 5 SUPPLY VOLTAGE (V) 6 Output 1 and 2 with 100A load
DROPOUT VOLTAGE (mV)
100
50
0 -40 -20 0 20 40 60 80 100120140 TEMPERATURE (C)
Ground Current vs. Output 1 Current
60 60
Ground Current vs. Output 2 Current
60 GROUND PIN CURRENT (A) 50 40 30 20 10 GROUND CURRENT (A) 50 40 30 20 10 0 0 50 100 150 200 250 300 OUTPUT 2 LOAD CURRENT (mA)
Ground Pin Current
1mA 100A 0A
GROUND CURRENT (A)
50 40 30 20 10 0 0 20 40 60 80 100 120 140 OUTPUT 1 LOAD CURRENT (mA)
Load on both outputs -40 -20 0 20 40 60 80 100 120 140 160 0
TEMPERATURE (C)
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Typical Characteristics (cont.)
Ground Current vs. Output Current
GROUND CURRENT (A)
35
35 30 25 20 15 10 5
Ground Current vs. Output Current
GROUND CURRENT (A)
60 50
Ground Current vs. Output Current
GROUND CURRENT (A)
30 25 20 15 10 5 LDO1 Only LDO2 Disabled (VEN2 = LOW) LDO1
Both Enabled 40 30 20 10 Both LDOs Active LDO2 = 300mA Output Current LDO1 Varied from 0 to Full Load
LDO2
LDO2 Only LDO1 Disabled (VEN1 = LOW)
0 0 50 100 150 OUTPUT 1 LOAD CURRENT (mA)
0 0 50 100 150 200 250 300 OUTPUT 2 LOAD CURRENT (mA)
0 0 50 100 150 OUTPUT 1 LOAD CURRENT (mA)
60
Ground Current vs. Output Current
OUTPUT VOLTAGE (V)
Output Voltage vs. Load Current
2.610 OUTPUT VOLTAGE (V) 2.605 2.600 2.595 2.590 2.585 2.580 0 25 50 75 100 125 150 OUTPUT 1 LOAD CURRENT (mA) 2.870 2.865 2.860 2.855 2.850 2.845 2.840 2.835 2.830
Output Voltage vs. Load Current
GROUND CURRENT (A)
50 Both Enabled 40 30 20 10 Both LDOs Active LDO1 = 150mA Output Current LDO2 Varied from 0 to Full Load
0 0 50 100 150 200 250 300 OUTPUT 2 LOAD CURRENT (mA)
2.825 2.820 0 50 100 150 200 250 300 OUTPUT 2 LOAD CURRENT (mA)
Output Voltage 1 vs. Temperature
3.15
OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V)
Output Voltage 2 vs. Temperature
2.95 2.90 2.85 2.80 2.75 2.70 2.65 -40 -20 0 20 40 60 80 100120140 TEMPERATURE (C)
ENABLE THRESHOLD (V)
Enable Voltage Threshold vs. Supply Voltage
1.60 1.40 1.20 1.00 0.80 0.60 0.40 0.20 0.00 2.25 2.75 3.25 3.75 4.25 4.75 5.25 SUPPLY VOLTAGE (V)
3.10 3.05 3.00 2.95 2.90
100A load
100A load
2.85 -40 -20 0 20 40 60 80 100120140 TEMPERATURE (C)
POR Delay
10M 1M 100k TIME (s) 10k 1k 100 10 1 1
CIN = 1F COUT = 1F ILOAD = 100A
10 100 1k 10k 100k 1M POR SETTING CAP (pF)
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Functional Characteristics
Enable Characteristics
Power-On Reset Characteristics
VEN (2V/div)
VOUT2 (1V/div) POR VOUT1 (1V/div) (2V/div)
VEN (2V/div)
VOUT2 (1V/div)
CIN = 1F COUT = 1F Ceramic CBYP = 0.01F VIN = 3.8V
CIN = 1F COUT = 1F Ceramic CSET = 0.01F CBYP = 0.01F VIN = 5V
VOUT1 (2V/div)
Time (100s/div)
Time (2ms/div)
Load Transient Response (LDO 1)
150mA
Load Transient Response (LDO 2)
300mA
VOUT1 IOUT1 (50mV/div) (100mA/div)
100A
VOUT2 IOUT2 (100mV/div) (200mA/div)
100A
VOUT2 (50mV/div)
Time (4s/div)
VOUT1 (100mV/div)
CIN = 1F COUT = 1F CBYP = 0.01F VIN = VOUT+1V
CIN = 1F COUT = 1F CBYP = 0.01F VIN = VOUT+1V
Time (4s/div)
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Functional Diagram
VIN LDO1 EN1
OUT1
OUT2 LDO2 EN2 SET CBYP Reference POR & Delay POR
GND
MIC2212 Fixed Voltage Block Diagram
Functional Description
The MIC2212 is a high performance, low quiescent current power management IC consisting of two Cap low dropout regulators, a power-on reset (POR) circuit and an open-drain driver. The first regulator is capable of sourcing 150mA at output voltages from 1.25V to 5V. The second regulator is capable of sourcing 300mA of current at output voltages from 1.25V to 5V. The second regulator has a POR circuit that monitors its output voltage and indicates when the output voltage is within 5% of nominal. The POR offers a delay time that is externally programmable with a single capacitor to ground. Enable 1 and 2 The enable inputs allow for logic control of both output voltages with individual enable inputs. The enable input is active high, requiring 1.8V for guaranteed operation. The enable input is CMOS logic and cannot by left floating. Power-On Reset (POR) The power-on reset output is an open-drain N-Channel device, requiring a pull-up resistor to either the input voltage or output voltage for proper voltage levels. The POR output has a delay time that is programmable with a capacitor from the SET pin to ground. The delay time can be programmed to be as long as 1 second. The SET pin is a current source output that charges a capacitor that sets the delay time for the power-on reset output. The current source is a 1A current source that charges a capacitor up from 0V. When the capacitor reaches 1.25V, the output of the POR is allowed to go high.
Input Capacitor Good bypassing is recommended from input to ground to help improve AC performance. A 1F capacitor or greater located close to the IC is recommended. Bypass Capacitor The internal reference voltage of the MIC2212 can be bypassed with a capacitor to ground to reduce output noise and increase power supply rejection (PSRR). A quick-start feature allows for quick turn-on of the output voltage regardless of the size of the capacitor. The recommended nominal bypass capacitor is 0.01F, but it can be increased without limit. Output Capacitor Each regulator output requires a 1F ceramic output capacitor for stability. The output capacitor value can be increased to improve transient response, but performance has been optimized for a 1F ceramic type output capacitor. X7R/X5R dielectric-type ceramic capacitors are recommended because of their temperature performance. X7Rtype 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 a X7R ceramic capacitor to ensure the same minimum capacitance over the equivalent operating temperature range.
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Package Information
0.85 +0.15 --0.05 3.00 BSC. 1.50 BSC. 0.48 typ. 0.01 +0.04 --0.01 0.23 +0.07 --0.05 1 2 3 0.20 dia 3.00 BSC.
1.60 +0.15 --0.15 0.80 +0.15 --0.15 PIN 1 ID
1.50 BSC.
1
+0.15 2 1.15 --0.15
3
2.30 +0.15 --0.15
0.50 BSC. 0.40 +0.15 --0.05 TOP BOTTOM
SEATING PLANE TERMINAL TIP
0.23 +0.07 --0.05
0.01 +0.04 --0.01
0.50 BSC. TERMINAL TIP ODD TERMINAL SIDE
0.50 BSC.
EVEN TERMINAL SIDE
10-Lead MLFTM (ML)
MICREL, INC. 1849 FORTUNE DRIVE SAN JOSE, CA 95131
TEL
USA
+ 1 (408) 944-0800
FAX
+ 1 (408) 474-1000
WEB
http://www.micrel.com
The information furnished by Micrel in this datasheet 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 at Purchaser's own risk and Purchaser agrees to fully indemnify Micrel for any damages resulting from such use or sale. (c) 2004 Micrel, Incorporated. M9999-080504
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