MIC2212
Micrel, Inc.
MIC2212
Dual µCap LDO and Power-On Reset
General Description
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.
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 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
VIN
EN1
Li-Ion
Battery
VOUT1
VOUT2
POR
V
I/O
V
CORE
/RST
Baseband
µProcessor
C
OUT
= 1µF
Ceramic
EN2
CBYP
SET
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.
Part Number
Voltage*
(Vo1/Vo2)
Junction Temp.
Range
Package
Ordering Information
Full
Manufacturing
Pb-Free
MIC2212-1.6/2.8BML
MIC2212-1.6/3.3BML
MIC2212-1.8/2.6BML
MIC2212-1.8/2.7BML
MIC2212-1.8/2.8BML
MIC2212-1.8/3.3BML
MIC2212-1.85/2.85BML
MIC2212-1.85/2.9BML
MIC2212-2.5/3.3BML
MIC2212-2.6/2.8BML
MIC2212-2.6/2.85BML
MIC2212-2.7/2.8BML
MIC2212-2.7/2.9BML
MIC2212-2.7/3.0BML
MIC2212-2.8/2.6BML
MIC2212-2.8/2.8BML
MIC2212-2.8/3.0BML
MIC2212-2.85/2.85BML
MIC2212-3.0/2.8BML
MIC2212-3.0/2.85BML
MIC2212-3.0/3.0BML
MIC2212-3.0/3.3BML
MIC2212-3.3/1.8BML
MIC2212-3.3/2.5BML
MIC2212-3.3/2.8BML
MIC2212-3.3/3.6BML
MIC2212-WMBML
MIC2212-WSBML
MIC2212-GKBML
MIC2212-GLBML
MIC2212-GMBML
MIC2212-GSBML
MIC2212-DNBML
MIC2212-DOBML
MIC2212-JSBML
MIC2212-KMBML
MIC2212-KNBML
MIC2212-LMBML
MIC2212-LOBML
MIC2212-LPBML
MIC2212-MKBML
MIC2212-MMBML
MIC2212-MPBML
MIC2212-NNBML
MIC2212-PMBML
MIC2212-PNBML
MIC2212-PPBML
MIC2212-PSBML
MIC2212-SGBML
MIC2212-SJBML
MIC2212-SMBML
MIC2212-SVBML
MIC2212-WMYML
MIC2212-WSYML
MIC2212-GKYML
MIC2212-GLYML
MIC2212-GMYML
MIC2212-GSYML
MIC2212-DNYML
MIC2212-DOYML
MIC2212-JSYML
MIC2212-KMYML
MIC2212-KNYML
MIC2212-LMYML
MIC2212-LOYML
MIC2212-LPYML
MIC2212-MKYML
MIC2212-MMYML
MIC2212-MPYML
MIC2212-NNYML
MIC2212-PMYML
MIC2212-PNYML
MIC2212-PPYML
MIC2212-PSYML
MIC2212-SGYML
MIC2212-SJYML
MIC2212-SMYML
MIC2212-SVYML
1.6V/2.8V
1.6V/3.3V
1.8V/2.6V
1.8V/2.7V
1.8V/2.8V
1.8V/3.3V
1.85V/2.85V
1.85V/2.9V
2.5V/3.3V
2.6V/2.8V
2.6V/2.85V
2.7V2.8V
2.7V/2.9V
2.7V/3.0V
2.8V/2.6V
2.8V/2.8V
2.8V/3.0V
2.85V/2.85V
3.0V/2.8V
3.0V/2.85V
3.0V/3.0V
3.0V/3.3V
3.3V/1.8V
3.3V/2.5V
3.3V/2.8V
3.3V/3.6V
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
10-Pin 3x3 MLF™
* For other output voltage options, contact Micrel marketing.
Voltage
Adj.
1.5
1.6
1.8
1.850
1.9
2.0
2.1
2.5
2.6
2.7
Code
A
F
W
G
D
Y
H
E
J
K
L
Voltage
2.8
2.850
2.9
3.0
3.1
3.2
3.3
3.4
3.5
3.6
Code
M
N
O
P
Q
R
S
T
U
V
Table 1. Voltage Codes
M9999-022106
2
February 2006
MIC2212
Micrel, Inc.
Pin Configuration
VIN
EN1
EN2
BYP
SET
1
2
3
4
5
10 VOUT1
9 VOUT2
8 POR
7 NC
6 GND
10-Pin 3mm
×
3mm MLF™ (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 0.01µF 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
February 2006
3
M9999-022106
MIC2212
Micrel, Inc.
Absolute Maximum Rating
(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
(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
MLF™-10 (θ
JA
) .................................................... 60°C/W
Electrical Characteristics
(4)
V
IN
= V
OUT
+1.0V for higher output of the regulator pair; C
OUT
= 1.0µF, I
OUT
= 100µA; T
J
= 25°C,
bold
values indicate
–40°C ≤ T
J
≤ +125°C; unless noted.
Parameter
Conditions
Min
Typ
Output Voltage Accuracy
Output Voltage Temp.
Coefficient
Line Regulation
(5)
Load Regulation
V
IN
= V
OUT
+1V to 5.5V
I
OUT
= 100µA to 150mA (Regulator 1 and 2)
I
OUT
= 100µA to 300mA (Regulator 2)
–0.3
–0.6
Variation from nominal V
OUT
–1.0
–2.0
40
0.02
0.2
0.3
0.6
1.0
1.5
120
240
48
60
2.0
60
40
150
300
280
450
30
0.6
1.8
–1
–1
90
96
0.02
–1
0.01
0.1
+1
0.01
0.01
+1
+1
460
700
190
250
340
420
65
80
Max
+1.0
+2.0
Units
%
%
ppm/C
%/V
%
%
mV
mV
mV
µA
µA
µA
µA
dB
dB
mA
mA
µVrms
V
V
µA
µA
%
%
V
µA
Dropout Voltage
(6)
I
OUT
= 150mA (Regulator 1 and 2)
I
OUT
= 300mA (Regulator 2)
Ground Pin Current
I
OUT1
= I
OUT2
= 0µA
I
OUT1
= 150mA and I
OUT2
= 300mA
V
EN
≤ 0.4V
Ground Pin Current in
Shutdown
Ripple Rejection
Current Limit
Output Voltage Noise
Enable Input
Enable Input Voltage
Enable Input Current
POR Output
V
TH
V
OL
f = 1kHz; C
OUT
= 1.0µF ceramic; C
BYP
= 10nF
V
OUT
= 0V (Regulator 1)
f = 20kHz; C
OUT
= 1.0µF ceramic; C
BYP
= 10nF
V
OUT
= 0V (Regulator 2)
C
OUT
=1µF, C
BYP
= 0.01µF, 10Hz to 100kHz
Logic Low (Regulator Shutdown)
Logic High (Regulator Enabled)
V
IH
> 1.8V (Regulator Enabled)
V
IL
< 0.6V (Regulator Shutdown)
High Threshold, % of nominal V
OUT2
(Flag OFF)
POR Output Logic Low Voltage; I
L
= 250µA
Flag Leakage Current, Flag OFF
Low Threshold, % of nominal V
OUT2
(Flag ON)
I
POR
M9999-022106
4
February 2006
MIC2212
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, Inc.
Conditions
V
SET
= 0V
Min
0.75
Typ
1.25
1.25
Max
1.75
Units
µA
V
P
OR
= High
3. The maximum allowable power dissipation of any T
A
(ambient temperature) is (P
D
(max) = T
J
(max) – T
A
) /
θ
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 V
OUT
+ 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 differen-
tial. For outputs below 2.25V, dropout voltage is the input-to-output voltage differential with the minimum input voltage 2.25V. Minimum input operat-
ing voltage is 2.25V.
February 2006
5
M9999-022106
ARM技术
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