MIC5335-3.3/2.8YMT-TR [MICROCHIP]
FIXED POSITIVE LDO REGULATOR;
| 型号： | MIC5335-3.3/2.8YMT-TR |
| 厂家： | 
MICROCHIP |
| 描述： | FIXED POSITIVE LDO REGULATOR |
| 文件： | 总10页 (文件大小：418K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MIC5335
Dual, High Performance
300mA µCap ULDO™
General Description
Features
• 2.3V to 5.5V input voltage range
The MIC5335 is a high current density, dual Ultra Low
Dropout (ULDO™) linear regulator. The MIC5335 is
ideally suited for portable electronics which demand
overall high performance in a very small form factor.
The MIC5335 is offered in the ultra small 1.6mm x
• Ultra-low dropout voltage: 75mV at 300mA
• Ultra Small 1.6mm x 1.6mm x 0.55mm 6 lead MLF®
package
• Independent enable pins
1.6mm x 0.55mm 6-ld Thin MLF® package, which is
• High PSRR > 65dB @ 1kHz
• 300mA output current per LDO
• µCap Stable with 1µF ceramic capacitor
• Low quiescent current: 90µA/LDO
• Fast turn-on time: 30µs
only 2.56mm2 in area. The MIC5335 delivers
exceptional
thermal
performance
for
those
applications that demand higher power dissipation in
a very small foot print. In addition, the MIC5335
integrates two high performance 300mA LDOs with
independent enable functions and offers high PSRR
eliminating the need for a bypass capacitor.
• Thermal Shutdown Protection
• Current Limit Protection
The MIC5335 is a µCap design which enables
operation with very small output capacitors for
stability, thereby reducing required board space and
component cost.
Applications
• Mobile Phones
The MIC5335 is available in fixed-output voltages.
Additional voltages are available. For more
information, contact Micrel’s Marketing department.
• PDAs
• GPS Receivers
• Portable electronics
• Portable media players
• Digital still and video cameras
Data sheets and support documentation can be found
on Micrel’s web site at: www.micrel.com.
Typical Application
ULDO is a trademark of Micrel, Inc.
MLF and MicroLead Frame are registered trademarks of Amkor Technologies.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
M9999-051508
May 2008
Micrel, Inc.
MIC5335
MIC5335 Block Diagram
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Micrel, Inc.
MIC5335
Ordering Information
Part number
Manufacturing
Marking
Voltage*
Junction
Package
Part Number
Temp. Range
MIC5335-1.8/1.5YMT
MIC5335-1.8/1.6YMT
MIC5335-1.8/1.8YMT
MIC5335-2.5/1.8YMT
MIC5335-2.5/2.5YMT
MIC5335-2.6/1.85YMT
MIC5335-2.6/1.8YMT
MIC5335-2.7/2.7YMT
MIC5335-2.8/1.5YMT
MIC5335-2.8/1.8YMT
MIC5335-2.8/2.6YMT
MIC5335-2.8/2.8YMT
MIC5335-2.85/1.85YMT
MIC5335-2.85/2.6YMT
MIC5335-2.85/2.85YMT
MIC5335-2.9/1.5YMT
MIC5335-2.9/1.8YMT
MIC5335-2.9/2.9YMT
MIC5335-3.0/1.8YMT
MIC5335-3.0/2.5YMT
MIC5335-3.0/2.6YMT
MIC5335-3.0/2.8YMT
MIC5335-3.0/2.85YMT
MIC5335-3.0/3.0YMT
MIC5335-3.3/1.5YMT
MIC5335-3.3/1.8YMT
MIC5335-3.3/2.5YMT
MIC5335-3.3/2.6YMT
MIC5335-3.3/2.7YMT
MIC5335-3.3/2.8YMT
MIC5335-GFYMT
MIC5335-GWYMT
MIC5335-GGYMT
MIC5335-JGYMT
MIC5335-JJYMT
MIC5335-KDYMT
MIC5335-KGYMT
MIC5335-LLYMT
MIC5335-MFYMT
MIC5335-MGYMT
MIC5335-MKYMT
MIC5335-MMYMT
MIC5335-NDYMT
MIC5335-NKYMT
MIC5335-NNYMT
MIC5335-OFYMT
MIC5335-OGYMT
MIC5335-OOYMT
MIC5335-PGYMT
MIC5335-PJYMT
MIC5335-PKYMT
MIC5335-PMYMT
MIC5335-PNYMT
MIC5335-PPYMT
MIC5335-SFYMT
MIC5335-SGYMT
MIC5335-SJYMT
MIC5335-SKYMT
MIC5335-SLYMT
MIC5335-SMYMT
GPF
GPW
GPG
JPG
JPJ
1.8V/1.5V
1.8V/1.6V
1.8V/1.8V
2.5V/1.8V
2.5V/2.5V
2.6V/1.85
2.6V/1.8V
2.7V/2.7V
2.8V/1.5V
2.8V/1.8V
2.8V/2.6V
2.8V/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
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
KPD
KPG
LPL
MPF
MPG
MPK
MPM
NPD
NPK
NPN
OPF
OPG
OPO
PPG
PPJ
2.85V/1.85V –40°C to +125°C
2.85V/2.6V –40°C to +125°C
2.85V/2.85V –40°C to +125°C
2.9V/1.5V
2.9V/1.8V
2.9V/2.9V
3.0V/1.8V
3.0V/2.5V
3.0V/2.6V
3.0V/2.8V
3.0V/2.85V
3.0V/3.0V
3.3V/1.5V
3.3V/1.8V
3.3V/2.5V
3.3V/2.6V
3.3V/2.7V
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
–40°C to +125°C
–40°C to +125°C
PPK
PPM
PPN
PPP
SPF
SPG
SPJ
SPK
SPL
SPM
MIC5335-3.3/2.85YMT
MIC5335-3.3/2.9YMT
MIC5335-3.3/3.0YMT
MIC5335-3.3/3.2YMT
MIC5335-SNYMT
MIC5335-SOYMT
MIC5335-SPYMT
MIC5335-SRYMT
MIC5335-SSYMT
SPN
SPO
SPP
SPR
SPS
3.3V/2.85V
3.3V/2.9V
3.3V/3.0V
3.3V/3.2V
3.3V/3.3V
–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
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
6-Pin 1.6x1.6 Thin MLF®
MIC5335-3.3/3.3YMT
Note:
*
For other voltages available. Contact Micrel Marketing for details.
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Micrel, Inc.
MIC5335
Pin Configuration
VIN
GND
EN2
1
2
3
6
5
4
VOUT1
VOUT2
EN1
6-pin 1.6mm × 1.6mm Thin MLF®
Top View
Pin Description
Pin Number
Thin MLF-6
Pin Name
Pin Function
1
2
3
VIN
GND
EN2
Supply Input.
Ground
Enable Input (regulator 2). Active High Input. Logic High = On; Logic Low = Off;
Do not leave floating.
4
EN1
Enable Input (regulator 1). Active High Input. Logic High = On; Logic Low = Off;
Do not leave floating.
5
6
VOUT2
VOUT1
EPAD
Regulator Output – LDO2
Regulator Output – LDO1
HS Pad
Exposed heatsink pad connected to ground internally.
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MIC5335
Absolute Maximum Ratings(1)
Operating Ratings(2)
Supply Voltage (VIN).....................................0V to +6V
Enable Input Voltage (VEN)...........................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 (VEN).............................. 0V to VIN
Junction Temperature .........................-40°C to +125°C
Junction Thermal Resistance
Thin MLF®-6 (θJA) ...................................100°C/W
Electrical Characteristics(5)
VIN = EN1 = EN2 = VOUT + 1.0V; higher of the two regulator outputs, IOUTLDO1 = IOUTLDO2 = 100µA; COUT1 = COUT2 = 1µF;
TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C, unless noted.
Parameter
Conditions
Min
-2.0
-3.0
Typ
Max
+2.0
+3.0
Units
%
Output Voltage Accuracy
Variation from nominal VOUT
Variation from nominal VOUT; –40°C to +125°C
%
Line Regulation
VIN = VOUT + 1V to 5.5V; IOUT = 100µA
0.02
0.3
0.6
%/V
%/V
Load Regulation
IOUT = 100µA to 300mA
IOUT = 100µA
0.3
0.1
25
2.0
%
Dropout Voltage (Note 6)
mV
mV
mV
mV
µA
µA
µA
µA
dB
I
I
I
OUT = 100mA
OUT = 150mA
OUT = 300mA
75
100
200
125
125
220
2
35
75
Ground Current
EN1 = High; EN2 = Low; IOUT = 100µA to 300mA
EN1 = Low; EN2 = High; IOUT = 100µA to 300mA
EN1 = EN2 = High; IOUT1 = 300mA, IOUT2 = 300mA
EN1 = EN2 = 0V
90
90
150
0.01
65
Ground Current in Shutdown
Ripple Rejection
f = 1kHz; COUT = 1.0µF
f = 20kHz; COUT = 1.0µF
45
Current Limit
VOUT = 0V
340
1.1
550
90
950
0.2
mA
Output Voltage Noise
Enable Inputs (EN1 / EN2)
Enable Input Voltage
COUT = 1.0µF; 10Hz to 100kHz
µVRMS
Logic Low
Logic High
VIL ≤ 0.2V
VIH ≥ 1.0V
V
V
Enable Input Current
0.01
0.01
1
1
µA
µA
Turn-on Time (See Timing Diagram)
Turn-on Time (LDO1 and 2)
COUT = 1.0µF
30
100
µs
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 its 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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MIC5335
Typical Characteristics
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MIC5335
Functional Characteristics
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MIC5335
Thermal Considerations
Applications Information
The MIC5335 is designed to provide 300mA of
continuous current for both outputs in a very small
package. Maximum ambient operating temperature
can be calculated based upon the output current and
the voltage drop across the part. Given that the input
Enable/Shutdown
The MIC5335 comes with dual active-high enable pins
that allow each regulator to be enabled independently.
Forcing the enable pin low disables the regulator and
sends it into a “zero” off-mode-current state. In this
state, current consumed by the regulator goes nearly
to zero. Forcing the enable pin high enables the
output voltage. The active-high enable pin uses
CMOS technology and the enable pin cannot be left
voltage is 3.3V, the output voltage is 2.8V for VOUT1
,
2.5V for VOUT2 and the output current = 300mA. The
actual power dissipation of the regulator circuit can be
determined using the equation:
PD = (VIN – VOUT1) IOUT1 + (VIN – VOUT2) IOUT2+ VIN IGND
floating;
a floating enable pin may cause an
Because this device is CMOS and the ground current
is typically <100µA over the load range, the power
dissipation contributed by the ground current is < 1%
and can be ignored for this calculation.
indeterminate state on the output.
Input Capacitor
The MIC5335 is a high-performance, high bandwidth
device. Therefore, it requires a well-bypassed input
supply for optimal performance. 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 small-valued NPO
dielectric-type capacitors, help filter out high-
frequency noise and are good practice in any RF-
based circuit.
PD = (3.3V – 2.8V) × 300mA + (3.3V – 2.5V) × 300mA
PD = 0.39W
To determine the maximum ambient operating
temperature of the package, use the junction-to-
ambient thermal resistance of the device and the
following basic equation:
T
− TA
⎛
⎜
⎜
⎝
⎞
⎟
⎟
⎠
J(max)
PD(max)
=
θJA
Output Capacitor
TJ(max) = 125°C, the maximum junction temperature of
The MIC5335 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.
the die θJA thermal resistance = 100°C/W.
The table that follows shows junction-to-ambient
thermal resistance for the MIC5335 in the Thin MLF®
package.
θJA
Recommended
Package
θJC
Minimum
Footprint
X7R/X5R dielectric-type ceramic capacitors are
recommended because of their temperature
6-Pin 1.6 X1.6
Thin MLF™
100°C/W
2°C/W
performance.
X7R-type
capacitors
change
capacitance by 15% over their operating temperature
range and are the most stable type of ceramic
capacitors on the market. 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
Thermal Resistance
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.
capacitance
temperature range.
over
the
equivalent
operating
The maximum power dissipation must not be
exceeded for proper operation.
For example, when operating the MIC5335-MFYML at
an input voltage of 3.3V and 300mA loads on each
output with a minimum footprint layout, the maximum
ambient operating temperature TA can be determined
as follows:
No-Load Stability
Unlike many other voltage regulators, the MIC5335
will remain stable and in regulation with no load. This
is especially important in CMOS RAM keep-alive
applications.
0.39W = (125°C – TA)/(100°C/W)
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MIC5335
TA=86°C
thermal effects on voltage regulators, refer to the
“Regulator Thermals” subsection of Micrel’s Designing
with Low-Dropout Voltage Regulators handbook. This
information can be found on Micrel's website at:
Therefore, a 2.8V/2.5V application with 300mA at
each output current can accept an ambient operating
temperature of 86°C in a 1.6mm x 1.6mm Thin MLF®
package. For a full discussion of heat sinking and
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
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Micrel, Inc.
MIC5335
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.
© 2006 Micrel, Inc.
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