MICREL MIC2212

MIC2212
Micrel, Inc.
MIC2212
Dual µCap LDO and Power-On Reset
General Description
Features
The MIC2212 is a dual µCap 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 48µA 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 µCap 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 × 3mm MLF™ leadless package.
• 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 48µA
• High output accuracy:
• +1.0% initial accuracy
• +2.0% over temperature
• Thermal shutdown protection
• Current limit protection
• Tiny 10-pin 3mm × 3mm MLF™ package
Applications
• Cellular/PCS phones
• Wireless modems
• PDAs
Typical Application
MIC2212-xxBML
Li-Ion
Battery
VIN
VOUT1
VI/O
EN1
VOUT2
VCORE
EN2
POR
CBYP
SET
/RST
Baseband
µProcessor
COUT = 1µF
Ceramic
GND
Sets del ay for POR
MIC2212 Typical Cell Phone Application
MicroLeadFrame and MLF are trademarks of Amkor Technology.
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
February 2006
1
M9999-022106
MIC2212
Micrel, Inc.
Ordering Information
Part Number
Voltage*
(Vo1/Vo2)
Junction Temp.
Range
Package
Full
Manufacturing
Pb-Free
MIC2212-1.6/2.8BML
MIC2212-WMBML
MIC2212-WMYML
1.6V/2.8V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-1.6/3.3BML
MIC2212-WSBML
MIC2212-WSYML
1.6V/3.3V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-1.8/2.6BML
MIC2212-GKBML
MIC2212-GKYML
1.8V/2.6V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-1.8/2.7BML
MIC2212-GLBML
MIC2212-GLYML
1.8V/2.7V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-1.8/2.8BML
MIC2212-GMBML
MIC2212-GMYML
1.8V/2.8V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-1.8/3.3BML
MIC2212-GSBML
MIC2212-GSYML
1.8V/3.3V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-1.85/2.85BML
MIC2212-DNBML
MIC2212-DNYML
1.85V/2.85V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-1.85/2.9BML
MIC2212-DOBML
MIC2212-DOYML
1.85V/2.9V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-2.5/3.3BML
MIC2212-JSBML
MIC2212-JSYML
2.5V/3.3V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-2.6/2.8BML
MIC2212-KMBML
MIC2212-KMYML
2.6V/2.8V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-2.6/2.85BML
MIC2212-KNBML
MIC2212-KNYML
2.6V/2.85V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-2.7/2.8BML
MIC2212-LMBML
MIC2212-LMYML
2.7V2.8V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-2.7/2.9BML
MIC2212-LOBML
MIC2212-LOYML
2.7V/2.9V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-2.7/3.0BML
MIC2212-LPBML
MIC2212-LPYML
2.7V/3.0V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-2.8/2.6BML
MIC2212-MKBML
MIC2212-MKYML
2.8V/2.6V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-2.8/2.8BML
MIC2212-MMBML
MIC2212-MMYML
2.8V/2.8V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-2.8/3.0BML
MIC2212-MPBML
MIC2212-MPYML
2.8V/3.0V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-2.85/2.85BML
MIC2212-NNBML
MIC2212-NNYML
2.85V/2.85V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-3.0/2.8BML
MIC2212-PMBML
MIC2212-PMYML
3.0V/2.8V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-3.0/2.85BML
MIC2212-PNBML
MIC2212-PNYML
3.0V/2.85V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-3.0/3.0BML
MIC2212-PPBML
MIC2212-PPYML
3.0V/3.0V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-3.0/3.3BML
MIC2212-PSBML
MIC2212-PSYML
3.0V/3.3V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-3.3/1.8BML
MIC2212-SGBML
MIC2212-SGYML
3.3V/1.8V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-3.3/2.5BML
MIC2212-SJBML
MIC2212-SJYML
3.3V/2.5V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-3.3/2.8BML
MIC2212-SMBML
MIC2212-SMYML
3.3V/2.8V
-40°C to +125°C
10-Pin 3x3 MLF™
MIC2212-3.3/3.6BML
MIC2212-SVBML
MIC2212-SVYML
3.3V/3.6V
-40°C to +125°C
10-Pin 3x3 MLF™
* For other output voltage options, contact Micrel marketing.
Voltage
Code
Voltage
Code
Adj.
A
2.8
M
1.5
F
2.850
N
1.6
W
2.9
O
1.8
G
3.0
P
1.850
D
3.1
Q
1.9
Y
3.2
R
2.0
H
3.3
S
2.1
E
3.4
T
2.5
J
3.5
U
2.6
K
3.6
V
2.7
L
Table 1. Voltage Codes
M9999-022106
2
February 2006
MIC2212
Micrel, Inc.
Pin Configuration
VIN
1
10 VOUT1
EN1
2
9 VOUT2
EN2
3
8 POR
BYP
4
7 NC
SET
5
6 GND
10-Pin 3mm × 3mm MLF™ (ML)
(Top View)
Pin Description
Pin Number
MLF-10 (3x3)
Pin Name
Pin Function
1
VIN
Supply Input: (VIN1 and VIN2 are internally tied together.)
2
EN1
Enable Input to Regulator 1: Enables regulator 1 output. Active high input.
High = on, low = off. Do not leave floating.
3
EN2
Enable Input to Regulator 2: Enables regulator 2 output. Active high input.
High = on, low = off. Do not leave floating.
4
CBYP
Reference Bypass: Connect external 0.01µF to GND to reduce output noise.
May be left open.
5
SET
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.
6
GND
Ground: Connect externally to Exposed Pad.
7
NC
8
POR
9
VOUT2
10
VOUT1
EP
GND
February 2006
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.
3
M9999-022106
MIC2212
Micrel, Inc.
Absolute Maximum Rating(1)
Operating Ratings(2)
Supply Input Voltage (VIN) ......................................0V to 7V
Enable Input Voltage (VEN) ....................................0V to 7V
Power Dissipation (PD) ................ Internally Limited, Note 3
Junction Temperature ............................... –40°C to +125°C
Storage Temperature (TS) .......................... –65°C to 150°C
Lead Temperature (soldering, 5 sec.) ........................ 260°C
Supply Input Voltage (VIN) ..............................2.25V to 5.5V
Enable Input Voltage (VEN) ................................... 0V to Vin
Junction Temperature (TJ) ........................ –40°C to +125°C
Package Thermal Resistance
MLF™-10 (θJA) .................................................... 60°C/W
Electrical Characteristics(4)
VIN = VOUT +1.0V for higher output of the regulator pair; COUT = 1.0µF, IOUT = 100µA; TJ = 25°C, bold values indicate
–40°C ≤ TJ ≤ +125°C; unless noted.
Parameter
Conditions
Min
Output Voltage Accuracy
Variation from nominal VOUT
–1.0
–2.0
Output Voltage Temp.
Coefficient
Max
Units
+1.0
+2.0
%
%
40
Line Regulation(5)
VIN = VOUT +1V to 5.5V
Load Regulation
IOUT = 100µA to 150mA (Regulator 1 and 2)
Voltage(6)
Typ
–0.3
–0.6
IOUT = 100µA to 300mA (Regulator 2)
ppm/C
0.02
0.3
0.6
%/V
0.2
1.0
%
1.5
%
IOUT = 150mA (Regulator 1 and 2)
120
190
250
mV
mV
IOUT = 300mA (Regulator 2)
240
340
420
mV
IOUT1 = IOUT2 = 0µA
48
65
80
µA
µA
IOUT1 = 150mA and IOUT2 = 300mA
60
Ripple Rejection
f = 1kHz; COUT = 1.0µF ceramic; CBYP = 10nF
60
Current Limit
VOUT = 0V (Regulator 1)
Dropout
Ground Pin Current
Ground Pin Current in
Shutdown
Output Voltage Noise
Enable Input
Enable Input Voltage
Enable Input Current
POR Output
VTH
VOL
IPOR
M9999-022106
2.0
VEN ≤ 0.4V
f = 20kHz; COUT = 1.0µF ceramic; CBYP = 10nF
VOUT = 0V (Regulator 2)
µA
dB
40
dB
150
280
460
300
450
700
COUT =1µF, CBYP = 0.01µF, 10Hz to 100kHz
30
Logic Low (Regulator Shutdown)
µA
mA
mA
µVrms
0.6
V
Logic High (Regulator Enabled)
1.8
VIL < 0.6V (Regulator Shutdown)
–1
0.01
+1
µA
VIH > 1.8V (Regulator Enabled)
–1
0.01
+1
µA
Low Threshold, % of nominal VOUT2 (Flag ON)
90
High Threshold, % of nominal VOUT2 (Flag OFF)
POR Output Logic Low Voltage; IL = 250µA
Flag Leakage Current, Flag OFF
4
V
%
96
–1
%
0.02
0.1
V
0.01
+1
µA
February 2006
MIC2212
Parameter
Micrel, Inc.
Conditions
Min
Typ
Max
Units
VSET = 0V
0.75
1.25
1.75
µA
SET Input
SET Pin Current Source
SET Pin Threshold Voltage
POR = High
1.25
V
Notes
1. Exceeding maximum rating may damage the device.
2. The device is not guaranteed to work outside its operating rating.
3. The maximum allowable power dissipation of any TA (ambient temperature) is (PD(max) = TJ(max) – TA) / θJA. 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.
February 2006
5
M9999-022106
MIC2212
Micrel, Inc.
CBYP = 100nF
CBYP = 10nF
Spectral Noise
Density Output 2
100µA Load
DROPOUT VOLTAGE (mV)
1.5
Dropout Voltage
Output 1
150mA load
Dropout Characteristics
Output 1
100µA
150mA
350
300
300mA load
150
100
50
0
-40 -20 0 20 40 60 80 100120140
TEMPERATURE °C)
(
0
-40 -20 0 20 40 60 80 100120140
TEMPERATURE °C)
(
Ground Current
vs. Output 1 Current
Ground Current
vs. Output 2 Current
60
50
40
30
20
10
0
0 20 40 60 80 100 120 140
OUTPUT 1 LOAD CURRENT (mA)
M9999-022106
60
100µA
300mA
1.5
1
0
0
Dropout Voltage
Output 2
200
50
2
1
2
3
4 5
SUPPLY VOLTAGE (V)
250
100
Dropout Characteristics
Output 2
3
0.5
0.5
0
0
100 1k
10k 100k 1M
FREQUENCY (Hz)
2.5
1
10k 100k 1M
100 1k
FREQUENCY (Hz)
150
GROUND CURRENT (µA)
2
COUT = 1µF
CIN = 1µF
CBYP = 0.01µF
10E-9
10
60
GROUND CURRENT (µA)
10E-9
10
COUT = 1µF
CIN = 1µF
CBYP = 0.01µF
100E-9
2.5
OUTPUT (V)
1E-6
100E-9
3
0.1
1
10 100 1000
FREQUENCY (kHz)
100µA Load
1E-6
50
50
1
2
3
4 5
SUPPLY VOLTAGE (V)
Ground Current
vs. Supply Voltage
Output 1 and 2
with 100µA load
40
30
20
10
0
0
60
GROUND PIN CURRENT (µA)
10E-6
VIN = VOUT + 1
IOUT = 300mA
COUT = 1µF
0
0.01
0.1
1
10 100 1000
FREQUENCY (kHz)
GROUND CURRENT (µA)
SPECTRAL NOISE DENSITY (V/root Hz)
20
VIN = VOUT + 1
IOUT = 150mA
COUT = 1µF
0
0.01
CBYP = 1nF
40
CBYP = 1nF
DROPOUT VOLTAGE (mV)
20
CBYP = 10nF
60
Spectral Noise
Density Output 1
10E-6
OUTPUT (V)
40
CBYP = 100nF
PSRR (dB)
PSRR (dB)
60
PSRR Output 2
80
1
2
3
4
5
SUPPLY VOLTAGE (V)
Ground Pin Current
1mA
50
40
40
30
6
0µA
100µA
30
20
20
10
10
0
0
50 100 150 200 250 300
OUTPUT 2 LOAD CURRENT (mA)
6
0
Load on both outputs
-40
-20
0
20
40
60
80
100
120
140
160
PSRR Output 1
80
SPECTRAL NOISE DENSITY (V/root Hz)
Typical Characteristics
TEMPERATURE °C)
(
February 2006
MIC2212
Micrel, Inc.
Typical Characteristics (cont.)
20
15
10
LDO1 Only
LDO2 Disabled (VEN2 = LOW)
5
0
0
50
100
150
OUTPUT 1 LOAD CURRENT (mA)
Ground Current
vs. Output Current
50
Both Enabled
40
30
20
Both LDOs Active
LDO1 = 150mA
Output Current LDO2
Varied from 0 to Full Load
10
0
0
50 100 150 200 250 300
OUTPUT 2 LOAD CURRENT (mA)
3.10
3.05
3.00
2.95
2.90
2.85
-40 -20 0 20 40 60 80 100120140
TEMPERATURE °C)
(
10M
20
10
5
Ground Current
vs. Output Current
Both Enabled
30
15
LDO2 Only
LDO1 Disabled (VEN1 = LOW)
10
Both LDOs Active
LDO2 = 300mA
Output Current LDO1
Varied from 0 to Full Load
0
0
50 100 150 200 250 300
OUTPUT 2 LOAD CURRENT (mA)
0
0
50
100
150
OUTPUT 1 LOAD CURRENT (mA)
Output Voltage
vs. Load Current
Output Voltage
vs. Load Current
2.600
2.595
2.590
2.585
2.580
0
25 50 75 100 125 150
OUTPUT 1 LOAD CURRENT (mA)
Output Voltage 1
vs. Temperature
100µA load
40
2.605
2.95
OUTPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
3.15
50
LDO2
20
2.610
OUTPUT VOLTAGE (V)
GROUND CURRENT (µA)
60
25
OUTPUT VOLTAGE (V)
LDO1
30
60
2.90
2.870
2.865
2.860
2.855
2.850
2.845
2.840
2.835
2.830
2.825
2.820
0
50 100 150 200 250 300
OUTPUT 2 LOAD CURRENT (mA)
Output Voltage 2
vs. Temperature
100µA load
1.60
ENABLE THRESHOLD (V)
25
GROUND CURRENT (µA)
GROUND CURRENT (µA)
35
30
Ground Current
vs. Output Current
GROUND CURRENT (µA)
Ground Current
vs. Output Current
35
2.85
2.80
2.75
2.70
2.65
-40 -20 0 20 40 60 80 100120140
TEMPERATURE °C)
(
Enable Voltage Threshold
vs. Supply Voltage
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)
POR Delay
1M
TIME (µs)
100k
10k
1k
100
CIN = 1µF
COUT = 1µF
ILOAD = 100µA
10
1
1
10 100 1k 10k 100k 1M
POR SETTING CAP (pF)
February 2006
7
M9999-022106
MIC2212
Micrel, Inc.
Functional Characteristics
Power-On Reset Characteristics
VOUT2
(1V/div)
POR
VOUT1
(1V/div)
(2V/div)
VEN
(2V/div)
CIN = 1µF
COUT = 1µF Ceramic
CBYP = 0.01µF
VIN = 3.8V
VOUT2
(1V/div)
Time (2ms/div)
Load Transient Response (LDO 1)
Load Transient Response (LDO 2)
VOUT2
IOUT2
(100mV/div) (200mA/div)
150mA
100µA
CIN = 1µF
COUT = 1µF
CBYP = 0.01µF
VIN = VOUT +1V
Time (4µs/div)
M9999-022106
CIN = 1µF
COUT = 1µF Ceramic
CSET = 0.01µF
CBYP = 0.01µF
VIN = 5V
Time (100µs/div)
VOUT1
(100mV/div)
VOUT2
(50mV/div)
VOUT1
IOUT1
(50mV/div) (100mA/div)
VOUT1
(2V/div)
VEN
(2V/div)
Enable Characteristics
300mA
100µA
CIN = 1µF
COUT = 1µF
CBYP = 0.01µF
VIN = VOUT +1V
Time (4µs/div)
8
February 2006
MIC2212
Micrel, Inc.
Functional Diagram
VIN
OUT1
LDO1
EN1
LDO2
EN2
OUT2
POR & Del ay
POR
SET
CBYP
Reference
GND
MIC2212 Fixed Voltage Block Diagram
Functional Description
Input Capacitor
Good bypassing is recommended from input to ground to
help improve AC performance. A 1µF 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 quickstart feature allows for quick turn-on of the output voltage
regardless of the size of the capacitor. The recommended
nominal bypass capacitor is 0.01µF, but it can be increased
without limit.
Output Capacitor
Each regulator output requires a 1µF ceramic output capacitor for stability. The output capacitor value can be increased
to improve transient response, but performance has been
optimized for a 1µF ceramic type output capacitor.
X7R/X5R dielectric-type 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 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.
The MIC2212 is a high performance, low quiescent current
power management IC consisting of two µCap 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 1µA 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.
February 2006
9
M9999-022106
MIC2212
Micrel, Inc.
Package Information
10-Pin 3mm x 3mm MLF (ML)
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
This 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.
© 2004 Micrel Incorporated
M9999-022106
10
February 2006