July 2003
1
MIC2212
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 sourc-
ing 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 48
A 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
3mm MLFTM leadless package.
Typical Application
VIN
EN1
EN2
CBYP
SET
Baseband
Processor
VOUT1
V
I/O
VOUT2
POR
V
CORE
/RST
GND
MIC2212-xxBML
C
OUT
= 1
F
Ceramic
Sets delay for POR
Li-Ion
Battery
MIC2212 Typical Cell Phone Application
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 48
A
High output accuracy:
+1.0% initial accuracy
+2.0% over temperature
Thermal shutdown protection
Current limit protection
Tiny 10-pin 3mm
3mm MLFTM package
Applications
Cellular/PCS phones
Wireless modems
PDAs
Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com
Micro
LeadFrame and MLF are trademarks of Amkor Technology.
MIC2212
Micrel
MIC2212
2
July 2003
Ordering Information
Full Part Number
Manufacturing
Voltage*
Junction Temp. Range
Package
Part Number
(Vo1/Vo2)
MIC2212-1.8/2.8BML
MIC2212-GMBML
1.8V/2.8V
40
C to +125
C
10-Pin 3
3 MLFTM
MIC2212-1.85/2.85BML
MIC2212-DNBML
1.85V/2.85V
40
C to +125
C
10-Pin 3
3 MLFTM
MIC2212-1.85/2.9BML
MIC2212-DOBML
1.85V/2.9V
40
C to +125
C
10-Pin 3
3 MLFTM
MIC2212-2.6/2.8BML
MIC2212-KMBML
2.6V/2.8V
40
C to +125
C
10-Pin 3
3 MLFTM
MIC2212-2.6/2.85BML
MIC2212-KNBML
2.6V/2.85V
40
C to +125
C
10-Pin 3
3 MLFTM
MIC2212-2.7/2.9BML
MIC2212-LOBML
2.7V/2.9V
40
C to +125
C
10-Pin 3
3 MLFTM
MIC2212-2.8/2.8BML
MIC2212-MMBML
2.8V/2.8V
40
C to +125
C
10-Pin 3
3 MLFTM
MIC2212-3.0/2.8BML
MIC2212-PMBML
3.0V/2.8V
40
C to +125
C
10-Pin 3
3 MLFTM
MIC2212-3.3/2.8BML
MIC2212-SMBML
3.3V/2.8V
40
C to +125
C
10-Pin 3
3 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
July 2003
3
MIC2212
MIC2212
Micrel
Pin Description
Pin Number
Pin Name
Pin Function
MLF-10 (3x3)
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 0.01
F 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
No Connection.
8
POR
Power-On Reset Output: Open-drain output. Active low indicates an output
undervoltage condition on regulator 2.
9
VOUT2
Output of Regulator 2: 300mA output current.
10
VOUT1
Output of Regulator 1: 150mA output current.
EP
GND
Ground: Internally connected to the Exposed Pad. Connect externally to
pin 6 of the IC.
1
VIN
EN1
EN2
BYP
SET
10 VOUT1
VOUT2
POR
NC
GND
9
8
7
6
2
3
4
5
10-Pin 3mm
3mm MLFTM (ML)
(Top View)
Pin Configuration
MIC2212
Micrel
MIC2212
4
July 2003
Electrical Characteristics
(Note 4)
V
IN
= V
OUT
+1.0V for higher output of the regulator pair; C
OUT
= 1.0
F, I
OUT
= 100
A; T
J
= 25
C, bold values indicate
40
C
T
J
+125
C; unless noted.
Parameter
Conditions
Min
Typ
Max
Units
Output Voltage Accuracy
Variation from nominal V
OUT
1.0
+1.0
%
2.0
+2.0
%
Output Voltage Temp. Coefficient
40
ppm/C
Line Regulation; Note 5
V
IN
= V
OUT
+1V to 5.5V
0.3
0.02
0.3
%/V
0.6
0.6
Load Regulation
I
OUT
= 100
A to 150mA (Regulator 1 and 2)
0.2
1.0
%
I
OUT
= 100
A to 300mA (Regulator 2)
1.5
%
Dropout Voltage, Note 6
I
OUT
= 150mA (Regulator 1 and 2)
120
190
mV
250
mV
I
OUT
= 300mA (Regulator 2)
240
340
mV
420
Ground Pin Current
I
OUT1
= I
OUT2
= 0
A
48
65
A
80
A
I
OUT1
= 150mA and I
OUT2
= 300mA
60
A
Ground Pin Current in Shutdown
V
EN
0.4V
2.0
A
Ripple Rejection
f = 1kHz; C
OUT
= 1.0
F ceramic; C
BYP
= 10nF
60
dB
f = 20kHz; C
OUT
= 1.0
F ceramic; C
BYP
= 10nF
40
dB
Current Limit
V
OUT
= 0V (Regulator 1)
150
280
460
mA
V
OUT
= 0V (Regulator 2)
300
450
700
mA
Output Voltage Noise
C
OUT
=1
F, C
BYP
= 0.01
F, 10Hz to 100kHz
30
Vrms
Enable Input
Enable Input Voltage
Logic Low (Regulator Shutdown)
0.6
V
Logic High (Regulator Enabled)
1.8
V
Enable Input Current
V
IL
< 0.6V (Regulator Shutdown)
1
0.01
+1
A
V
IH
> 1.8V (Regulator Enabled)
1
0.01
+1
A
POR Output
V
TH
Low Threshold, % of nominal V
OUT2
(Flag ON)
90
%
High Threshold, % of nominal V
OUT2
(Flag OFF)
96
%
V
OL
POR Output Logic Low Voltage; I
L
= 250
A
0.02
0.1
V
I
POR
Flag Leakage Current, Flag OFF
1
0.01
+1
A
Absolute Maximum Rating
(Note 1)
Supply Input Voltage (V
IN
) .................................... 0V to 7V
Enable Input Voltage (V
EN
) ................................... 0V to 7V
Power Dissipation (P
D
) ............... Internally Limited, Note 3
Junction Temperature .............................. 40
C to +125
C
Storage Temperature (T
S
) ......................... 65
C to 150
C
Lead Temperature (soldering, 5 sec.) ....................... 260
C
Operating Ratings
(Note 2)
Supply Input Voltage (V
IN
) ............................ 2.25V to 5.5V
Enable Input Voltage (V
EN
) .................................. 0V to Vin
Junction Temperature (T
J
) ....................... 40
C to +125
C
Package Thermal Resistance
MLFTM-10 (
JA
) .................................................... 60
C/W
July 2003
5
MIC2212
MIC2212
Micrel
Parameter
Conditions
Min
Typ
Max
Units
SET Input
SET Pin Current Source
V
SET
= 0V
0.75
1.25
1.75
A
SET Pin Threshold Voltage
P
OR
= High
1.25
V
Note 1.
Exceeding maximum rating may damage the device.
Note 2.
The device is not guaranteed to work outside its operating rating.
Note 3.
The maximum allowable power dissipation of any T
A
(ambient temperature) is (P
D(max)
= T
J(max)
T
A
) /
JA
. Exceeding the maximum
allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown.
Note 4.
Specification for packaged product only.
Note 5.
Minimum input for line regulation test is set to V
OUT
+ 1V relative to the highest output voltage.
Note 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.
MIC2212
Micrel
MIC2212
6
July 2003
0
0.5
1
1.5
2
2.5
3
0
1
2
3
4
5
OUTPUT (V)
SUPPLY VOLTAGE (V)
Dropout Characteristics
Output 1
150mA
100
A
0
0.5
1
1.5
2
2.5
3
0
1
2
3
4
5
OUTPUT (V)
SUPPLY VOLTAGE (V)
Dropout Characteristics
Output 2
300mA
100
A
0
10
20
30
40
50
60
0
1
2
3
4
5
6
GROUND CURRENT (
A)
SUPPLY VOLTAGE (V)
Ground Current
vs. Supply Voltage
Output 1 and 2
with 100
A load
0
10
20
30
40
50
60
0
20 40 60 80 100 120 140
GROUND CURRENT (
A)
OUTPUT 1 LOAD CURRENT (mA)
Ground Current
vs. Output 1 Current
0
10
20
30
40
50
60
0
50
100 150 200 250 300
GROUND CURRENT (
A)
OUTPUT 2 LOAD CURRENT (mA)
Ground Current
vs. Output 2 Current
10E-9
100E-9
1E-6
10E-6
SPECTRAL NOISE DENSITY (V/root Hz)
FREQUENCY (Hz)
Spectral Noise
Density Output 1
C
OUT
= 1
F
C
IN
= 1
F
C
BYP
= 0.01
F
100
A Load
10
100
1k
10k
100k
1M
10
100
1k
10k
100k
1M
10E-9
100E-9
1E-6
10E-6
SPECTRAL NOISE DENSITY (V/root Hz)
FREQUENCY (Hz)
Spectral Noise
Density Output 2
100
A Load
C
OUT
= 1
F
C
IN
= 1
F
C
BYP
= 0.01
F
0
20
40
60
80
0.01
0.1
1
10
100
1000
PSRR (dB)
FREQUENCY (kHz)
PSRR Output 2
C
BYP
= 10nF
C
BYP
= 100nF
C
BYP
= 1nF
V
IN
= V
OUT
+ 1
I
OUT
= 300mA
C
OUT
= 1
F
0
20
40
60
80
0.01
0.1
1
10
100
1000
PSRR (dB)
FREQUENCY (kHz)
PSRR Output 1
C
BYP
= 10nF
C
BYP
= 100nF
C
BYP
= 1nF
V
IN
= V
OUT
+ 1
I
OUT
= 150mA
C
OUT
= 1
F
0
50
100
150
-40 -20 0 20 40 60 80 100120140
DROPOUT VOLTAGE (mV)
TEMPERATURE (
C)
Dropout Voltage
Output 1
150mA load
0
50
100
150
200
250
300
350
-40 -20 0 20 40 60 80 100120140
DROPOUT VOLTAGE (mV)
TEMPERATURE (
C)
Dropout Voltage
Output 2
300mA load
0
10
20
30
40
50
60
-40
-20
0
20
40
60
80
100
120
140
160
GROUND PIN CURRENT (
A)
TEMPERATURE (
C)
Ground Pin Current
Load on both outputs
0
A
100
A
1mA
Typical Characteristics
July 2003
7
MIC2212
MIC2212
Micrel
0
5
10
15
20
25
30
35
0
50
100
150
GROUND CURRENT (
A)
OUTPUT 1 LOAD CURRENT (mA)
Ground Current
vs. Output Current
LDO1 Only
LDO2 Disabled (V
EN2
= LOW)
LDO1
0
5
10
15
20
25
30
35
0
50
100 150 200 250 300
GROUND CURRENT (
A)
OUTPUT 2 LOAD CURRENT (mA)
Ground Current
vs. Output Current
LDO2 Only
LDO1 Disabled (V
EN1
= LOW)
LDO2
0
10
20
30
40
50
60
0
50
100
150
GROUND CURRENT (
A)
OUTPUT 1 LOAD CURRENT (mA)
Ground Current
vs. Output Current
Both LDOs Active
LDO2 = 300mA
Output Current LDO1
Varied from 0 to Full Load
Both Enabled
0
10
20
30
40
50
60
0
50
100 150 200 250 300
GROUND CURRENT (
A)
OUTPUT 2 LOAD CURRENT (mA)
Ground Current
vs. Output Current
Both LDOs Active
LDO1 = 150mA
Output Current LDO2
Varied from 0 to Full Load
Both Enabled
Typical Characteristics (cont.)
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
1.60
2.25 2.75 3.25 3.75 4.25 4.75 5.25
ENABLE THRESHOLD (V)
SUPPLY VOLTAGE (V)
Enable Voltage Threshold
vs. Supply Voltage
TIME (
s)
POR SETTING CAP (pF)
POR Delay
C
IN
= 1
F
COUT = 1
F
I
LOAD = 100
A
1
10
100
1k
10k 100k 1M
1
10
100
1k
10k
100k
10M
1M
2.65
2.70
2.75
2.80
2.85
2.90
2.95
-40 -20 0 20 40 60 80 100120140
OUTPUT VOLTAGE (V)
TEMPERATURE (
C)
Output Voltage 2
vs. Temperature
100
A load
2.85
2.90
2.95
3.00
3.05
3.10
3.15
-40 -20 0 20 40 60 80 100120140
OUTPUT VOLTAGE (V)
TEMPERATURE (
C)
Output Voltage 1
vs. Temperature
100
A load
2.580
2.585
2.590
2.595
2.600
2.605
2.610
0
25
50
75
100 125 150
OUTPUT VOLTAGE (V)
OUTPUT 1 LOAD CURRENT (mA)
Output Voltage
vs. Load Current
2.820
2.825
2.830
2.835
2.840
2.845
2.850
2.855
2.860
2.865
2.870
0
50
100 150 200 250 300
OUTPUT VOLTAGE (V)
OUTPUT 2 LOAD CURRENT (mA)
Output Voltage
vs. Load Current
MIC2212
Micrel
MIC2212
8
July 2003
Enable Characteristics
Time (100
s/div)
VEN
(2V/div)
V
OUT1
(2V/div)
V
OUT2
(1V/div)
C
IN
= 1
F
C
OUT
= 1
F Ceramic
C
BYP
= 0.01
F
V
IN
= 3.8V
Power-On Reset Characteristics
Time (2ms/div)
VEN
(2V/div)
POR
(1V/div)
V
OUT1
(2V/div)
V
OUT2
(1V/div)
C
IN
= 1
F
C
OUT
= 1
F Ceramic
C
SET
= 0.01
F
C
BYP
= 0.01
F
V
IN
= 5V
Load Transient Response (LDO 2)
Time (4
s/div)
IOUT2
(200mA/div)
V
OUT1
(100mV/div)
V
OUT2
(100mV/div)
C
IN
= 1
F
C
OUT
= 1
F
C
BYP
= 0.01
F
V
IN
= V
OUT
+1V
300mA
100
A
Load Transient Response (LDO 1)
Time (4
s/div)
IOUT1
(100mA/div)
V
OUT1
(50mV/div)
V
OUT2
(50mV/div)
C
IN
= 1
F
C
OUT
= 1
F
C
BYP
= 0.01
F
V
IN
= V
OUT
+1V
150mA
100
A
Functional Characteristics
July 2003
9
MIC2212
MIC2212
Micrel
Functional Diagram
OUT1
OUT2
POR
GND
CBYP
SET
EN1
EN2
VIN
LDO1
LDO2
Reference
POR & Delay
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 1
A 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 1
F capacitor or greater
located close to the IC is recommended.
Bypass Capacitor
The internal reference voltage of the MIC2212 can be by-
passed with a capacitor to ground to reduce output noise and
increase power supply rejection (PSRR). A quick-start fea-
ture allows for quick turn-on of the output voltage regardless
of the size of the capacitor. The recommended nominal
bypass capacitor is 0.01
F, but it can be increased without
limit.
Output Capacitor
Each regulator output requires a 1
F ceramic output capaci-
tor for stability. The output capacitor value can be increased
to improve transient response, but performance has been
optimized for a 1
F ceramic type output capacitor.
X7R/X5R dielectric-type ceramic capacitors are recom-
mended because of their temperature performance. X7R-
type capacitors change capacitance by 15% over their oper-
ating 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 capaci-
tor with Y5V dielectric, the value must be much higher than a
X7R ceramic capacitor to ensure the same minimum capaci-
tance over the equivalent operating temperature range.
MIC2212
Micrel
MIC2212
10
July 2003
Package Information
0.20 dia
0.48 typ.
3.00 BSC.
1.50 BSC.
PIN 1 ID
0.85
3.00 BSC.
TOP
BOTTOM
ODD TERMINAL SIDE
EVEN TERMINAL SIDE
TERMINAL TIP
TERMINAL TIP
1.50 BSC.
1
2
3
1
2
3
--0.05
+0.15
0.01
0.50 BSC.
0.50 BSC.
0.50 BSC.
--0.01
+0.04
0.23
--0.05
+0.07
0.23
--0.05
+0.07
0.01
--0.01
+0.04
0.40
--0.05
+0.15
1.60
--0.15
+0.15
0.80
--0.15
+0.15
2.30
--0.15
+0.15
1.15
--0.15
+0.15
SEATING PLANE
10-Lead MLFTM (ML)
MICREL, INC.
1849 FORTUNE DRIVE
SAN JOSE, CA 95131
USA
TEL
+ 1 (408) 944-0800
FAX
+ 1 (408) 944-0970
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.
2003 Micrel, Incorporated.
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