MICREL MIC2212

MIC2212
Micrel
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
/RST
Baseband
µProcessor
COUT = 1µF
Ceramic
SET
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
August 2004
1
M9999-080504
MIC2212
Micrel
Ordering Information
Full Part Number
Manufacturing
Part Number
Voltage*
(Vo1/Vo2)
Junction Temp. Range
Package
MIC2212-GMBML
1.8V/2.8V
–40°C to +125°C
10-Pin 3×3 MLF™
MIC2212-1.85/2.85BML
MIC2212-DNBML
1.85V/2.85V
–40°C to +125°C
10-Pin 3×3 MLF™
MIC2212-1.85/2.9BML
MIC2212-DOBML
1.85V/2.9V
–40°C to +125°C
10-Pin 3×3 MLF™
MIC2212-2.6/2.8BML
MIC2212-KMBML
2.6V/2.8V
–40°C to +125°C
10-Pin 3×3 MLF™
MIC2212-2.6/2.85BML
MIC2212-KNBML
2.6V/2.85V
–40°C to +125°C
10-Pin 3×3 MLF™
MIC2212-2.7/2.8BML
MIC2212-LMBML
2.7V/2.8V
–40°C to +125°C
10-Pin 3×3 MLF™
MIC2212-2.7/2.9BML
MIC2212-LOBML
2.7V/2.9V
–40°C to +125°C
10-Pin 3×3 MLF™
MIC2212-2.8/2.6BML
MIC2212-MKBML
2.8V/2.6V
–40°C to +125°C
10-Pin 3×3 MLF™
MIC2212-2.8/2.8BML
MIC2212-MMBML
2.8V/2.8V
–40°C to +125°C
10-Pin 3×3 MLF™
MIC2212-2.8/3.0BML
MIC2212-MPBML
2.8V/3.0V
–40°C to +125°C
10-Pin 3×3 MLF™
MIC2212-3.0/2.8BML
MIC2212-PMBML
3.0V/2.8V
–40°C to +125°C
10-Pin 3×3 MLF™
MIC2212-3.3/1.8BML
MIC2212-SGBML
3.3V/1.8V
–40°C to +125°C
10-Pin 3×3 MLF™
MIC2212-3.3/2.8BML
MIC2212-SMBML
3.3V/2.8V
–40°C to +125°C
10-Pin 3×3 MLF™
MIC2212-1.8/2.8BML
* 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
M9999-080504
2
August 2004
MIC2212
Micrel
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
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
Output of Regulator 2: 300mA output current.
10
VOUT1
Output of Regulator 1: 150mA output current.
EP
GND
August 2004
Pin Function
No Connection.
Power-On Reset Output: Open-drain output. Active low indicates an output
undervoltage condition on regulator 2.
Ground: Internally connected to the Exposed Pad. Connect externally to
pin 6 of the IC.
3
M9999-080504
MIC2212
Micrel
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)1" square 2oz. copper ................. 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
Line
Regulation(5)
Load Regulation
Typ
Dropout
Ground Pin Current
Units
+1.0
+2.0
%
%
40
VIN = VOUT +1V to 5.5V
–0.3
–0.6
IOUT = 100µA to 150mA (Regulator 1 and 2)
ppm/C
0.02
0.3
0.6
%/V
0.2
1.0
%
1.5
%
IOUT = 100µA to 300mA (Regulator 2)
Voltage(6)
Max
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
µA
Ground Pin Current in Shutdown
VEN ≤ 0.4V
Ripple Rejection
f = 1kHz; COUT = 1.0µF ceramic; CBYP = 10nF
60
dB
f = 20kHz; COUT = 1.0µF ceramic; CBYP = 10nF
40
dB
Current Limit
Output Voltage Noise
2.0
µA
VOUT = 0V (Regulator 1)
150
280
460
mA
VOUT = 0V (Regulator 2)
300
450
700
mA
COUT =1µF, CBYP = 0.01µF, 10Hz to 100kHz
µVrms
30
Enable Input
Enable Input Voltage
Enable Input Current
Logic Low (Regulator Shutdown)
0.6
V
Logic High (Regulator Enabled)
1.8
V
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
POR Output
VTH
%
High Threshold, % of nominal VOUT2 (Flag OFF)
VOL
POR Output Logic Low Voltage; IL = 250µA
IPOR
Flag Leakage Current, Flag OFF
M9999-080504
4
–1
96
%
0.02
0.1
V
0.01
+1
µA
August 2004
MIC2212
Parameter
Micrel
Conditions
Min
Typ
Max
Units
SET Pin Current Source
VSET = 0V
0.75
1.25
1.75
µA
SET Pin Threshold Voltage
POR = High
SET Input
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.
August 2004
5
M9999-080504
MIC2212
Micrel
PSRR Output 1
PSRR Output 2
80
80
CBYP = 100nF
CBYP = 100nF
CBYP = 10nF
40
20
CBYP = 1nF
VIN = VOUT + 1
IOUT = 300mA
COUT = 1µF
0
0.01
1000
0.1
1
10
100
FREQUENCY (kHz)
1000
Spectral Noise
Density Output 1
10E-6
100µA Load
1E-6
100E-9
COUT = 1µF
C = 1µF
IN
CBYP = 0.01µF
10E-9
10
Dropout Characteristics
Output 1
Spectral Noise
Density Output 2
1k
100
10k 100k
FREQUENCY (Hz)
1M
Dropout Characteristics
Output 2
3
3
2.5
2.5
10E-6
1E-6
100E-9
COUT = 1µF
C = 1µF
2
1.5
100µA
150mA
1
0.5
IN
OUTPUT (V)
OUTPUT (V)
100µA Load
2
100µA
300mA
1.5
1
0.5
CBYP = 0.01µF
200
150
100
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
30
20
10
0
0 20 40 60 80 100 120 140
OUTPUT 1 LOAD CURRENT (mA)
M9999-080504
30
20
10
1
2
3
4
5
SUPPLY VOLTAGE (V)
6
Ground Pin Current
60
50
40
30
20
10
0
0
50 100 150 200 250 300
OUTPUT 2 LOAD CURRENT (mA)
6
1mA
50
100µA
40
0µA
30
20
10
Load on both outputs
0
140
160
40
40
100
120
50
Output 1 and 2
with 100µA load
0
0
60
GROUND CURRENT (µA)
60
GROUND CURRENT (µA)
50
50
60
80
50
300mA load
250
GROUND CURRENT (µA)
100
60
350
300
1
2
3
4
5
SUPPLY VOLTAGE (V)
Ground Current
vs. Supply Voltage
Dropout Voltage
Output 2
Dropout Voltage
Output 1
150mA load
0
0
1
2
3
4
5
SUPPLY VOLTAGE (V)
20
40
0
0
1M
GROUND PIN CURRENT (µA)
DROPOUT VOLTAGE (mV)
150
100
1k
10k 100k
FREQUENCY (Hz)
-40
-20
0
10E-9
10
DROPOUT VOLTAGE (mV)
SPECTRAL NOISE DENSITY (V/root Hz)
0.1
1
10
100
FREQUENCY (kHz)
CBYP = 1nF
40
20
VIN = VOUT + 1
IOUT = 150mA
COUT = 1µF
0
0.01
CBYP = 10nF
60
PSRR (dB)
PSRR (dB)
60
SPECTRAL NOISE DENSITY (V/root Hz)
Typical Characteristics
TEMPERATURE (°C)
August 2004
MIC2212
Micrel
Typical Characteristics (cont.)
GROUND CURRENT (µA)
25
LDO1
20
15
10
LDO1 Only
LDO2 Disabled (VEN2 = LOW)
5
60
30
25
LDO2
20
15
10
5
LDO2 Only
LDO1 Disabled (VEN1 = LOW)
Ground Current
vs. Output Current
50
Both Enabled
40
30
20
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)
Ground Current
vs. Output Current
Output Voltage
vs. Load Current
Output Voltage
vs. Load Current
Both Enabled
40
30
Both LDOs Active
LDO1 = 150mA
Output Current LDO2
Varied from 0 to Full Load
10
2.870
2.605
2.865
2.860
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
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
3.15
Enable Voltage Threshold
vs. Supply Voltage
2.95
100µA load
OUTPUT VOLTAGE (V)
3.10
2.855
2.850
3.05
3.00
2.95
2.90
2.85
-40 -20 0 20 40 60 80 100120140
TEMPERATURE (°C)
2.90
1.60
100µA load
ENABLE THRESHOLD (V)
20
2.610
OUTPUT VOLTAGE (V)
50
0
0
50 100 150 200 250 300
OUTPUT 2 LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
Ground Current
vs. Output Current
0
0
50
100
150
OUTPUT 1 LOAD CURRENT (mA)
OUTPUT VOLTAGE (V)
GROUND CURRENT (µA)
30
60
GROUND CURRENT (µA)
35
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)
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
10M
1M
TIME (µs)
100k
10k
1k
100
CIN = 1µF
COUT = 1µF
ILOAD = 100µA
10
1
1
August 2004
10 100 1k 10k 100k 1M
POR SETTING CAP (pF)
7
M9999-080504
MIC2212
Micrel
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)
VOUT1
(2V/div)
VEN
(2V/div)
Enable Characteristics
CIN = 1µF
COUT = 1µF Ceramic
CSET = 0.01µF
CBYP = 0.01µF
VIN = 5V
Time (100µs/div)
Time (2ms/div)
Load Transient Response (LDO 1)
Load Transient Response (LDO 2)
300mA
VOUT2
IOUT2
(100mV/div) (200mA/div)
100µA
CIN = 1µF
COUT = 1µF
CBYP = 0.01µF
VIN = VOUT+1V
VOUT1
(100mV/div)
VOUT2
(50mV/div)
VOUT1
IOUT1
(50mV/div) (100mA/div)
150mA
Time (4µs/div)
M9999-080504
100µA
CIN = 1µF
COUT = 1µF
CBYP = 0.01µF
VIN = VOUT+1V
Time (4µs/div)
8
August 2004
MIC2212
Micrel
Functional Diagram
VIN
OUT1
LDO1
EN1
OUT2
LDO2
EN2
POR & Delay
POR
SET
CBYP
Reference
GND
MIC2212 Fixed Voltage Block Diagram
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 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 0.01µF, 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. 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.
Functional Description
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.
August 2004
9
M9999-080504
MIC2212
Micrel
Package Information
0.85 +0.15
—0.05
1.60 +0.15
—0.15
3.00 BSC.
0.80 +0.15
—0.15
1.50 BSC.
0.01 +0.04
—0.01
0.48 typ.
PIN 1 ID
0.23 +0.07
—0.05
1
1
1.50 BSC.
+0.15
2 1.15 —0.15
2
3.00 BSC.
3
2.30 +0.15
—0.15
3
0.20 dia
0.50 BSC.
0.40 +0.15
—0.05
TOP
SEATING PLANE
TERMINAL TIP
BOTTOM
0.23 +0.07
—0.05
0.01 +0.04
—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
TEL
+ 1 (408) 944-0800
FAX
+ 1 (408) 474-1000
WEB
USA
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
10
August 2004