Micrel MIC5322-3.0/2.8YMT Dual, high performance 150ma î¼cap uldoâ ¢ Datasheet

MIC5322
Dual, High Performance 150mA
µCap ULDO™
General Description
Features
The MIC5322 is a tiny Dual Ultra Low-Dropout
(ULDO™) linear regulator ideally suited for those
applications that require high Power Supply Rejection
Ratio (PSRR). It provides a bypass pin to increase
PSRR for noise sensitive portable electronics. The
MIC5322 integrates two high-performance; 150mA
ULDOs into a very compact 1.6mm x 1.6mm leadless
Thin MLF® package with exceptional thermal package
characteristics.
The MIC5322 is a µCap design which enables
operation with very small ceramic output capacitors
for stability, thereby reducing required board space
and component cost. The combination of extremely
low-drop-out voltage, very high power supply
rejection, very low output noise and exceptional
thermal package characteristics makes it ideal for
powering RF applications, cellular phones, GPS,
imaging sensors for digital still cameras, PDAs, MP3
players and other portable applications.
The MIC5322 ULDO™ is available in fixed-output
voltages in a tiny 6-pin 1.6mm x 1.6mm leadless Thin
MLF® package which is only 2.56mm2 in area, - 30%
less area than the SOT-23, TSOP and MLF® 3x3
packages. Additional voltage options are available.
For more information, contact Micrel marketing
department.
Data sheets and support documentation can be found
on Micrel’s web site at: www.micrel.com.
• 2.3V to 5.5V input voltage range
• Ultra-low dropout voltage ULDO™ 35mV @
150mA
• Tiny 6-pin 1.6mm x 1.6mm Thin MLF® leadless
package
• Bypass pin for improved noise performance
• High PSRR – >75dB on each LDO
• Ultra low noise output - > 30µVrms
• Dual 150mA outputs
• µCap stable with 1µF ceramic capacitor
• Low quiescent current – 150µA
• Fast turn-on time – 45µs
• Thermal shutdown protection
• Current Limit protection
Applications
•
•
•
•
•
•
Mobile phones
GPS receivers
Portable media players
Digital still and video cameras
PDAs
Portable electronics
Typical Application
MIC5322-x.xYMT
VIN
1µF
VOUT 1
RF
VOUT 2
Core
EN
BYP
GND
1µF
1µF
GPS
Module
0.01µF
RF Power Supply Circuit
ULDO is a trademark of Micrel, Inc.
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
May 2008
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Micrel, Inc.
MIC5322
Ordering Information
Part number
Marking
Manufacturing
Part Number
(1)
Voltage(2)
Package
Junction
Temp. Range
MIC5322-2.8/1.5YMT
MIC5322-MFYMT
VMF
2.8V/1.5V
–40°C to +125°C
6-Pin 1.6x1.6 Thin MLF®
MIC5322-2.8/1.8YMT
MIC5322-MGYMT
VMG
2.8V/1.8V
–40°C to +125°C
6-Pin 1.6x1.6 Thin MLF®
MIC5322-2.85/2.85YMT
MIC5322-NNYMT
VNN
2.85V/2.85V
–40°C to +125°C
6-Pin 1.6x1.6 Thin MLF®
MIC5322-3.0/2.8YMT
MIC5322-PMYMT
VPM
3.0V/2.8V
–40°C to +125°C
6-Pin 1.6x1.6 Thin MLF®
MIC5322-3.0/2.85YMT
MIC5322-PNYMT
VPN
3.0V/2.85V
–40°C to +125°C
6-Pin 1.6x1.6 Thin MLF®
MIC5322-3.0/3.0YMT
MIC5322-PPYMT
VPP
3.0V/3.0V
–40°C to +125°C
6-Pin 1.6x1.6 Thin MLF®
Notes:
1. Pin 1 identifier = ▲
2. For other voltage options. Contact Micrel Marketing for details.
Pin Configuration
VIN 1
6
VOUT1
GND 2
5
VOUT2
BYP 3
4
EN
6-Pin 1.6mm x 1.6mm Thin MLF® (MT)
Top View
Pin Description
Pin Number
Thin MLF-6
Pin Name
Pin Function
1
VIN
Supply Input.
2
GND
Ground
3
BYP
Reference Bypass: Connect external 0.01µF to GND to reduce output noise.
May be left open.
4
/EN
Enable Input (both regulators): Active Low Input. Logic High = OFF; Logic Low = ON; Do
not leave floating.
5
VOUT2
Regulator Output – LDO2
6
VOUT1
Regulator Output – LDO1
HS Pad
EPAD
May 2008
Exposed heatsink pad connected to ground internally.
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Micrel, Inc.
MIC5322
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VIN) .....................................0V to +6V
Enable Input Voltage (V/EN) ..........................0V to +6V
Power Dissipation………………….Internally Limited(3)
Lead Temperature (soldering, 3sec) ..................260°C
Storage Temperature (TS) ................ –65°C to +150°C
ESD Rating(4) .........................................................2kV
Supply Voltage (VIN).............................. +2.3V to +5.5V
Enable Input Voltage (V/EN) ............................. 0V to VIN
Junction Temperature (TJ) ................. –40°C to +125°C
Junction Thermal Resistance
6-pin 1.6mmx1.6mm Thin MLF® (θJA) .... 100°C/W
Electrical Characteristics(5)
VIN = VOUT + 1.0V; higher of the two regulator outputs, IOUTLDO1 = IOUTLDO2 = 100µA; V/EN = 0V; COUT1 = COUT2 = 1µF;
CBYP = 0.01µF; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C, unless noted.
Parameter
Conditions
Min
Output Voltage Accuracy
Variation from nominal VOUT
Variation from nominal VOUT; –40°C to +125°C
Line Regulation
Load Regulation
Dropout Voltage
(6)
Typ
Max
Units
-2.0
+2.0
%
-3.0
+3.0
%
VIN = VOUT + 1V to 5.5V; IOUT = 100µA
0.02
0.3
0.6
%/V
%/V
IOUT = 100µA to 150mA
0.5
2.0
%
IOUT = 100µA
0.1
IOUT = 50mA
12
IOUT = 100mA
mV
50
mV
25
75
mV
mV
IOUT = 150mA
35
100
Ground Current
V/EN = Low; IOUT1 = 150mA; IOUT2 = 150mA
150
190
µA
Ground Current in Shutdown
V/EN = High
0.01
2
µA
Ripple Rejection
f = 1kHz; COUT = 1.0µF; CBYP = 0.1µF
75
dB
f = 20kHz; COUT = 1.0µF; CBYP = 0.1µF
45
dB
300
Current Limit
VOUT = 0V
Output Voltage Noise
COUT = 1.0µF; CBYP = 0.01µF; 10Hz to 100kHz
550
950
30
mA
µVRMS
Enable Inputs (/EN)
Enable Input Voltage
0.2
Logic Low
1.2
Logic High
Enable Input Current
V
V
VIL ≤ 0.2V
0.01
1
µA
VIH ≥ 1.2V
0.01
1
µA
COUT = 1.0µF; No CBYP
40
100
µs
COUT = 1.0µF; CBYP = 0.01µF
45
100
µs
Turn-on Time (See Timing Diagram)
Turn-on Time (LDO1 and 2)
Notes:
1. Exceeding the absolute maximum rating may damage the device.
2. The device is not guaranteed to function 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. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
5. Specification for packaged product only.
6. Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below it’s nominal VOUT. For outputs below 2.3V,
the dropout voltage is the input-to-output differential with the minimum input voltage 2.3V
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MIC5322
Functional Diagram
VIN
VOUT 1
LDO1
LDO2
VOUT 2
EN
Enable
BYP
Reference
GND
MIC5322 Block Diagram
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Micrel, Inc.
MIC5322
Typical Characteristics
-90
Power Supply
Rejection Ratio
40
-80
35
-70
30
-60
50mA
-40
-30 VIN = VOUT +1V
VOUT = 2.8V
150mA
-20 COUT = 1µF
C
=
0.1µF
-10 BYP
/EN = Low
0
0.1
1
10
100
1,000
FREQUENCY (kHz)
Ground Current
vs. Temperature
20
15
10
0
0
150
150
140
140
135
125
120
3.00
2.95
VIN = VOUT + 1V
VOUT = 3V
COUT = 1µF
/EN = Low
20 40 60 80
TEMPERATURE (°C)
Output Voltage
vs. Temperature
2.55
2.50
1.60
162
100mA
50mA
10mA
100µA
20 40 60 80
TEMPERATURE (°C)
Ground Current
vs. Output Current
150mA
154
150
146
VIN = VOUT + 1V
VOUT = 3V
COUT = 1µF
/EN = Low
130
125
120
142
138
0
20 40 60 80
TEMPERATURE (°C)
Output Voltage
vs. Input Voltage
3.0
2.90
VIN = VOUT + 1V
VOUT = 2.85V
/EN = Low
COUT1 = COUT2 = 1µF
25 50 75 100 125 150
OUTPUT CURRENT (mA)
Output Voltage
vs. Output Current
2.8V
2.85
2.0
1.5
VIN = VOUT + 1V
VOUT = 2.8V
COUT = 1µF
/EN = Low
20 40 60 80
TEMPERATURE (°C)
Output Voltage
vs. Output Current
1.55
1.50
1.45 VIN = VOUT + 1V
VOUT = 1.5V
COUT1 = COUT2 = 1µF
/EN = Low
1.40
0
25 50 75 100 125 150
OUTPUT CURRENT (mA)
May 2008
30
25
20
15
10
5
0
150mA
158
2.5
2.90
2.85
2.80
2.75
2.70
2.65
2.60
Ground Current
vs. Temperature
145
135
130
25 50 75 100 125 150
OUTPUT CURRENT (mA)
160
155
100µA
VOUT = 2.8V
COUT = 1µF
/EN = Low
5
155
145
50
VOUT = 2.8V
45 COUT = 1µF
40 /EN = Low
35
25
-50
160
Dropout Voltage
vs. Temperature
Dropout Voltage
vs. Output Current
2.80
1.5V
1.0
IOUT = 100µA
COUT = 1µF
/EN = Low
0.5
0.0
0
610
600
1
2
3
4
5
INPUT VOLTAGE (V)
6
Current Limit
vs. Input Voltage
10
590
580
570
560
Output Noise
Spectral Density
1
0.1
550
540
530
520
510
3
2.75 VIN = VOUT + 1V
VOUT = 2.8V
COUT1 = COUT2 = 1µF
/EN = Low
2.70
0
25 50 75 100 125 150
OUTPUT CURRENT (mA)
/EN = Low
COUT = 1µF
3.5
4
4.5
5
INPUT VOLTAGE (V)
5
5.5
VIN = 3.8V
0.01 VOUT = 2.8V
COUT = 1µF
CBYP = 0.01µF
/EN = Low
0.001
0.01 0.1 1
10 100 1,000 10,000
FREQUENCY (kHz)
M9999-051508-B
Micrel, Inc.
MIC5322
Functional Characteristics
May 2008
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Micrel, Inc.
MIC5322
Applications Information
/Enable/Shutdown
The MIC5322 comes with a single active-low enable
pin that allows both regulators to be disabled
simultaneously. Forcing the enable pin high disables
the regulators and sends it into a “zero” off-modecurrent state. In this state, current consumed by the
regulator goes nearly to zero. Forcing the enable pin
low enables the output voltages. The active-low
enable pin cannot be left floating since a floating
enable pin may cause an indeterminate state on the
output.
Bypass Capacitor
A capacitor can be placed from the noise bypass pinto-ground to reduce output voltage noise. The
capacitor bypasses the internal reference. A 0.1µF
capacitor is recommended for applications that require
low-noise outputs. The bypass capacitor can be
increased, further reducing noise and improving
PSRR. Turn-on time increases slightly with respect to
bypass capacitance. A unique, quick-start circuit
allows the MIC5322 to drive a large capacitor on the
bypass pin without significantly slowing turn-on time.
Refer to the Typical Characteristics section of this
datasheet for performance with different bypass
capacitors.
Input Capacitor
The MIC5322 is a high-performance, high bandwidth
device. Therefore optimal performance can be
achieved by providing a well-bypassed input supply. A
1µF capacitor is required from the input-to-ground to
provide stability. Low-ESR ceramic capacitors provide
optimal performance at a minimum of space.
Additional high-frequency capacitors, such as smallvalued NPO dielectric-type capacitors, help filter out
high-frequency noise and are good practice in any
RF-based circuit.
No-Load Stability
Unlike many other voltage regulators, the MIC5322
will remain stable and in regulation with no load. This
is especially important in CMOS RAM keep-alive
applications.
Thermal Considerations
The MIC5322 is designed to provide 150mA of
continuous current for both outputs in a very small
package. Maximum ambient operating temperature
can be calculated based on the output current and the
voltage drop across the part. As an example: Given
that the input voltage is 3.3V, the output voltage is
2.8V for VOUT1, 1.5V for VOUT2 and the output current at
150mA. The actual power dissipation of the regulator
circuit can be determined using the equation:
Output Capacitor
The MIC5322 requires an output capacitor of 1µF or
greater to maintain stability. The design is optimized,
for use, with low-ESR ceramic chip capacitors. High
ESR capacitors may cause high frequency oscillation.
The output capacitor can be increased, but
performance has been optimized for a 1µF ceramic
output capacitor and does not improve significantly
with larger capacitance.
X7R/X5R dielectric-type ceramic capacitors are
recommended because of their temperature stable
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 an X7R ceramic capacitor to ensure
the same minimum capacitance over the equivalent
operating temperature range.
PD = (VIN – VOUT1) IOUT1 + (VIN – VOUT2) IOUT2+ VIN IGND
Because this device is CMOS and the ground current
is typically <150µA over the load range, the power
dissipation contributed by the ground current is < 1%
and can be ignored for this calculation.
PD = (3.3V – 2.8V) × 150mA + (3.3V -1.5) × 150mA
PD = 0.345W
To determine the maximum ambient operating
temperature of the package, use the junction-toambient thermal resistance of the device and the
following basic equation:
PD(MAX) =
⎛
⎝
TJ(MAX) - TA
JA
TJ(max) = 125°C, the maximum junction temperature of
the die θJA thermal resistance = 100°C/W.
The table below shows junction-to-ambient thermal
resistance for the MIC5322 in the Thin MLF® package.
May 2008
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M9999-051508-B
Micrel, Inc.
MIC5322
Package
6-Pin 1.6x1.6 Thin MLF
®
θJA Recommended
Minimum Footprint
θJC
100°C/W
2°C/W
For example, when operating the MIC5322-MFYMT at
an input voltage of 3.3V and 150mA loads at each
output with a minimum footprint layout, the maximum
ambient operating temperature TA can be determined
as follows:
Thermal Resistance
0.345W = (125°C – TA)/(100°C/W)
Substituting PD for PD(max) and solving for the ambient
operating temperature will give the maximum
operating conditions for the regulator circuit. The
junction-to-ambient thermal resistance for the
minimum footprint is 100°C/W.
The maximum power dissipation must not be
exceeded for proper operation.
May 2008
TA = 90.5°C
Therefore, a 2.8V/1.5V application with 150mA at
each output current can accept an ambient operating
temperature of 90.5°C in a 1.6mm x 1.6mm Thin
MLF® package. For a full discussion of heat sinking
and thermal effects on voltage regulators, refer to the
“Regulator Thermals” section of Micrel’s Designing
with Low-Dropout Voltage Regulators handbook. This
information can be found on Micrel's website at:
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
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Micrel, Inc.
MIC5322
Package Information
6-Pin 1.6mm x 1.6mm Thin MLF (MT)
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
The 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.
© 2007 Micrel, Inc.
May 2008
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