MIC2212-1.8BML [MICREL]
Dual uCap LDO and Power-On Reset; 双UCAP LDO和上电复位
| 型号： | MIC2212-1.8BML |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | Dual uCap LDO and Power-On Reset |
| 文件： | 总10页 (文件大小：207K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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 sourc-
ing 150mA, while the second regulator can source up to
300mA and includes a power-on reset function.
• 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
Ideal for battery operated applications, the MIC2212 offers
1% accuracy, extremely low dropout voltage (80mV @
100mA), and extremely low ground current, only 48µA total.
EquippedwithTTL-logic-compatibleenablepins,theMIC2212
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.
Applications
• Cellular/PCS phones
• Wireless modems
• PDAs
Typical Application
MIC2212-xxBML
VIN
VOUT1
VI/O
VCORE
EN1
EN2
CBYP
SET
VOUT2
POR
Li-Ion
/RST
Battery
Baseband
µProcessor
COUT = 1µF
Ceramic
GND
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
M9999-080504
August 2004
1
MIC2212
Micrel
Ordering Information
Full Part Number
Manufacturing
Voltage*
Junction Temp. Range
Package
Part Number
(Vo1/Vo2)
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
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
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
–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 3×3 MLF™
10-Pin 3×3 MLF™
10-Pin 3×3 MLF™
10-Pin 3×3 MLF™
10-Pin 3×3 MLF™
10-Pin 3×3 MLF™
10-Pin 3×3 MLF™
10-Pin 3×3 MLF™
10-Pin 3×3 MLF™
10-Pin 3×3 MLF™
10-Pin 3×3 MLF™
10-Pin 3×3 MLF™
10-Pin 3×3 MLF™
* For other output voltage options, contact Micrel marketing.
Voltage
Adj.
1.5
Code
A
F
1.6
W
G
D
Y
1.8
1.85
1.9
2.0
H
E
2.1
2.5
J
2.6
K
2.7
L
2.8
M
N
O
P
2.850
2.9
3.0
3.1
Q
R
S
3.2
3.3
3.4
T
3.5
U
V
3.6
Table 1. Voltage Codes
M9999-080504
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August 2004
MIC2212
Micrel
Pin Configuration
10 VOUT1
9 VOUT2
8 POR
VIN
EN1
EN2
BYP
SET
1
2
3
4
5
7 NC
6 GND
10-Pin 3mm × 3mm MLF™ (ML)
(Top View)
Pin Description
Pin Number
MLF-10 (3x3)
Pin Name
Pin Function
1
2
VIN
Supply Input: (VIN1 and VIN2 are internally tied together.)
EN1
Enable Input to Regulator 1: Enables regulator 1 output. Active high input.
High = on, low = off. Do not leave floating.
3
4
5
EN2
CBYP
SET
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.
6
7
8
GND
NC
Ground: Connect externally to Exposed Pad.
No Connection.
POR
Power-On Reset Output: Open-drain output. Active low indicates an output
undervoltage condition on regulator 2.
9
VOUT2
VOUT1
GND
Output of Regulator 2: 300mA output current.
Output of Regulator 1: 150mA output current.
10
EP
Ground: Internally connected to the Exposed Pad. Connect externally to
pin 6 of the IC.
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M9999-080504
MIC2212
Micrel
Absolute Maximum Rating(1)
Operating Ratings(2)
Supply Input Voltage (V ) .................................... 0V to 7V
Supply Input Voltage (V ) ............................ 2.25V to 5.5V
IN
IN
Enable Input Voltage (V ) ................................... 0V to 7V
Enable Input Voltage (V ) .................................. 0V to Vin
EN
EN
Power Dissipation (P ) ............... Internally Limited, Note 3
Junction Temperature (T ) ....................... –40°C to +125°C
D
J
Junction Temperature .............................. –40°C to +125°C
Package Thermal Resistance
MLF™-10 (θ )1" square 2oz. copper.................60°C/W
Storage Temperature (T ) ......................... –65°C to 150°C
JA
S
Lead Temperature (soldering, 5 sec.) ....................... 260°C
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
Typ
Max
Units
Output Voltage Accuracy
Variation from nominal VOUT
–1.0
–2.0
+1.0
+2.0
%
%
Output Voltage Temp. Coefficient
Line Regulation(5)
40
ppm/C
%/V
VIN = VOUT +1V to 5.5V
–0.3
0.02
0.3
–0.6
0.6
Load Regulation
I
OUT = 100µA to 150mA (Regulator 1 and 2)
0.2
1.0
%
%
IOUT = 100µA to 300mA (Regulator 2)
1.5
Dropout Voltage(6)
IOUT = 150mA (Regulator 1 and 2)
120
240
48
190
250
mV
mV
I
OUT = 300mA (Regulator 2)
340
420
mV
Ground Pin Current
IOUT1 = IOUT2 = 0µA
65
80
µA
µA
IOUT1 = 150mA and IOUT2 = 300mA
60
µA
µA
Ground Pin Current in Shutdown
Ripple Rejection
VEN ≤ 0.4V
2.0
f = 1kHz; COUT = 1.0µF ceramic; CBYP = 10nF
f = 20kHz; COUT = 1.0µF ceramic; CBYP = 10nF
VOUT = 0V (Regulator 1)
60
40
dB
dB
Current Limit
150
300
280
450
30
460
700
mA
VOUT = 0V (Regulator 2)
mA
Output Voltage Noise
Enable Input
COUT =1µF, CBYP = 0.01µF, 10Hz to 100kHz
µVrms
Enable Input Voltage
Logic Low (Regulator Shutdown)
Logic High (Regulator Enabled)
VIL < 0.6V (Regulator Shutdown)
VIH > 1.8V (Regulator Enabled)
0.6
V
V
1.8
–1
–1
Enable Input Current
0.01
0.01
+1
+1
µA
µA
POR Output
VTH
Low Threshold, % of nominal VOUT2 (Flag ON)
High Threshold, % of nominal VOUT2 (Flag OFF)
POR Output Logic Low Voltage; IL = 250µA
Flag Leakage Current, Flag OFF
90
%
%
V
96
0.1
+1
VOL
0.02
0.01
IPOR
–1
µA
M9999-080504
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August 2004
MIC2212
Micrel
Parameter
Conditions
Min
Typ
Max
Units
SET Input
SET Pin Current Source
SET Pin Threshold Voltage
VSET = 0V
0.75
1.25
1.25
1.75
µA
POR = High
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 T (ambient temperature) is (P (max) = T (max) – T ) / θ . Exceeding the maximum allowable
A
D
J
A
JA
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
+ 1V relative to the highest output voltage.
OUT
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
operating voltage is 2.25V.
August 2004
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M9999-080504
MIC2212
Micrel
Typical Characteristics
Spectral Noise
Density Output 1
PSRR Output 1
PSRR Output 2
80
80
60
40
20
0
10E-6
1E-6
CBYP = 100nF
CBYP = 100nF
100µA Load
CBYP = 10nF
CBYP = 10nF
60
CBYP = 1nF
CBYP = 1nF
40
100E-9
COUT = 1µF
20
VIN = VOUT + 1
IOUT = 150mA
VIN = VOUT + 1
IOUT = 300mA
COUT = 1µF
C
IN = 1µF
BYP = 0.01µF
C
COUT = 1µF
0
10E-9
0.01 0.1
1
10
100 1000
0.01 0.1
1
10
100 1000
10
100
1k
10k 100k 1M
FREQUENCY (kHz)
FREQUENCY (kHz)
FREQUENCY (Hz)
Dropout Characteristics
Output 1
Dropout Characteristics
Output 2
Spectral Noise
Density Output 2
3
2.5
2
3
2.5
2
10E-6
1E-6
100µA Load
100µA
100µA
150mA
300mA
1.5
1
1.5
1
100E-9
10E-9
COUT = 1µF
CIN = 1µF
0.5
0.5
CBYP = 0.01µF
0
0
0
1
2
3
4
5
0
1
2
3
4
5
10
100
1k
10k 100k 1M
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
FREQUENCY (Hz)
Ground Current
vs. Supply Voltage
Dropout Voltage
Output 2
Dropout Voltage
Output 1
60
50
40
30
20
10
0
150
100
50
350
300
250
200
150
100
50
Output 1 and 2
with 100µA load
150mA load
300mA load
0
0
0
1
2
3
4
5
6
-40 -20
0
20 40 60 80 100120140
-40 -20
0
20 40 60 80 100120140
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
TEMPERATURE (°C)
Ground Current
vs. Output 1 Current
Ground Current
vs. Output 2 Current
Ground Pin Current
60
50
40
30
20
10
0
60
50
40
30
20
10
0
60
50
40
30
20
10
0
1mA
100µA
0µA
Load on both outputs
0
20 40 60 80 100 120 140
0
50 100 150 200 250 300
OUTPUT 1 LOAD CURRENT (mA)
OUTPUT 2 LOAD CURRENT (mA)
TEMPERATURE (°C)
M9999-080504
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August 2004
MIC2212
Micrel
Typical Characteristics (cont.)
Ground Current
vs. Output Current
Ground Current
vs. Output Current
Ground Current
vs. Output Current
35
60
50
40
30
20
35
30
25
20
15
10
5
30
Both Enabled
25
LDO1
LDO2
20
15
10
Both LDOs Active
LDO2 = 300mA
10 Output Current LDO1
Varied from 0 to Full Load
LDO2 Only
LDO1 Disabled (VEN1 = LOW)
LDO1 Only
LDO2 Disabled (VEN2 = LOW)
5
0
0
0
0
50
100
150
0
50
100
150
0
50 100 150 200 250 300
OUTPUT 1 LOAD CURRENT (mA)
OUTPUT 1 LOAD CURRENT (mA)
OUTPUT 2 LOAD CURRENT (mA)
Output Voltage
vs. Load Current
Output Voltage
vs. Load Current
Ground Current
vs. Output Current
2.610
2.605
2.600
2.595
2.590
2.585
2.580
2.870
2.865
2.860
2.855
2.850
2.845
2.840
2.835
2.830
2.825
2.820
60
50
40
30
20
10
0
Both Enabled
Both LDOs Active
LDO1 = 150mA
Output Current LDO2
Varied from 0 to Full Load
0
50 100 150 200 250 300
0
25 50 75 100 125 150
0
50 100 150 200 250 300
OUTPUT 2 LOAD CURRENT (mA)
OUTPUT 1 LOAD CURRENT (mA)
OUTPUT 2 LOAD CURRENT (mA)
Output Voltage 1
vs. Temperature
Output Voltage 2
vs. Temperature
Enable Voltage Threshold
vs. Supply Voltage
3.15
3.10
3.05
3.00
2.95
2.90
2.85
2.95
2.90
2.85
2.80
2.75
2.70
2.65
1.60
1.40
1.20
1.00
0.80
0.60
0.40
0.20
0.00
100µA load
100µA load
-40 -20
0
20 40 60 80 100120140
-40 -20
0
20 40 60 80 100120140
2.25 2.75 3.25 3.75 4.25 4.75 5.25
SUPPLY VOLTAGE (V)
TEMPERATURE (°C)
TEMPERATURE (°C)
POR Delay
10M
1M
100k
10k
1k
100
10
CIN = 1µF
COUT = 1µF
I
LOAD = 100µA
1
100
10k 100k 1M
1
10
1k
POR SETTING CAP (pF)
August 2004
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M9999-080504
MIC2212
Micrel
Functional Characteristics
Enable Characteristics
Power-On Reset Characteristics
CIN = 1µF
COUT = 1µF Ceramic
CSET = 0.01µF
CBYP = 0.01µF
VIN = 5V
CIN = 1µF
COUT = 1µF Ceramic
CBYP = 0.01µF
VIN = 3.8V
Time (100µs/div)
Time (2ms/div)
Load Transient Response (LDO 1)
Load Transient Response (LDO 2)
300mA
100µA
150mA
100µA
CIN = 1µF
CIN = 1µF
COUT = 1µF
CBYP = 0.01µF
VIN = VOUT+1V
COUT = 1µF
CBYP = 0.01µF
VIN = VOUT+1V
Time (4µs/div)
Time (4µs/div)
M9999-080504
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August 2004
MIC2212
Micrel
Functional Diagram
VIN
OUT1
LDO1
EN1
OUT2
POR
LDO2
EN2
SET
POR & Delay
CBYP
Reference
GND
MIC2212 Fixed Voltage Block Diagram
Input Capacitor
Functional Description
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.
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.
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 0.01µF, but it can be increased without
limit.
Enable 1 and 2
Output Capacitor
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.
Each regulator output requires a 1µF ceramic output capaci-
tor 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.
Power-On Reset (POR)
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
ceramiccapacitors.Z5UandY5Vdielectriccapacitorschange
value by as much as 50% and 60% respectively over their
operatingtemperatureranges. Touseaceramicchipcapaci-
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.
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.
August 2004
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M9999-080504
MIC2212
Micrel
Package Information
+0.15
0.85
0.01
—0.05
+0.15
1.60
0.80
—0.15
+0.15
—0.15
3.00 BSC.
+0.04
—0.01
1.50 BSC.
1.50 BSC.
0.48 typ.
PIN 1 ID
+0.07
—0.05
0.23
1
1
2
3
+0.15
—0.15
1.15
2
3
+0.15
3.00 BSC.
2.30
—0.15
0.20 dia
0.50 BSC.
+0.15
—0.05
0.40
TOP
BOTTOM
SEATING PLANE
TERMINAL TIP
+0.07
—0.05
0.23
+0.04
—0.01
0.01
0.50 BSC.
0.50 BSC.
TERMINAL TIP
ODD TERMINAL SIDE
EVEN TERMINAL SIDE
10-Lead MLF™ (ML)
MICREL, INC. 1849 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 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.
© 2004 Micrel, Incorporated.
M9999-080504
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August 2004
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