MIC5310
Dual, 150mA Cap LDO in 2mm x 2mm MLF
ULDO is a trademark of Micrel, Inc.
MLF and
Micro
LeadFrame 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
April 2006
M9999-042406
(408) 955-1690
General Description
The MIC5310 is a tiny Dual Ultra Low-Dropout
(ULDOTM) linear regulator ideally suited for portable
electronics due to its high power supply ripple
rejection (PSRR) and ultra low output noise. The
MIC5310 integrates two high-performance; 150mA
ULDOs into a tiny 2mm x 2mm leadless MLF
package, which provides exceptional thermal package
characteristics.
The MIC5310 is a Cap 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, high power supply rejection and
exceptional thermal package characteristics makes it
ideal for powering RF/noise sensitive circuitry, cellular
phone camera modules, imaging sensors for digital
still cameras, PDAs, MP3 players and WebCam
applications
The MIC5310 ULDOTM is available in fixed-output
voltages in the tiny 8-pin 2mm x 2mm leadless MLF
package which occupies less than half the board area
of a single SOT-6 package. 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.
Features
2.3V to 5.5V input voltage range
Ultra-low dropout voltage ULDOTM 35mV @ 150mA
High PSRR - >70dB @ 1KHz
Ultra-low output noise: 30V
RMS
2% initial output accuracy
Tiny 8-pin 2mm x 2mm MLF
leadless package
Excellent Load/Line transient response
Fast start-up time: 30s
Cap stable with 1F ceramic capacitor
Thermal shutdown protection
Low quiescent current: 75A per output
Current limit protection
Applications
Mobile phones
PDAs
GPS receivers
Portable electronics
Portable media players
Digital still and video cameras
Typical Application
VIN
EN 2
VOUT 1
VOUT 2
GND
MIC5310-x.xYML
1F
0.1F
EN 1
BYP
1F
Rx/Synth
Tx
RF
Transceiver
1F
RF Power Supply Circuit
Micrel, Inc.
MIC5310
April 2006
2
M9999-042406
(408) 955-1690
Block Diagram
EN 1
Enable
Reference
LDO1
EN 2
LDO2
BYP
VIN
VOUT 1
VOUT 2
GND
MIC5310 Fixed Block Diagram
Micrel, Inc.
MIC5310
April 2006
3
M9999-042406
(408) 955-1690
Ordering Information
Part number
Manufacturing
Part Number
Voltage
Junction
Temperature Range
Package
MIC5310-1.8/1.5YML MIC5310-GFYML 1.8V/1.5V
40C to +125C
8-Pin 2x2 MLF
MIC5310-2.5/2.5YML
MIC5310-JJYML
2.5V/2.5V
40C to +125C
8-Pin 2x2 MLF
MIC5310-2.6/1.85YML MIC5310-KDYML
2.6V/1.85V
40C to +125C
8-Pin 2x2 MLF
MIC5310-2.8/1.5YML MIC5310-MFYML
2.8V/1.5V
40C to +125C
8-Pin 2x2 MLF
MIC5310-2.8/1.8YML MIC5310-MGYML
2.8V/1.8V
40C to +125C
8-Pin 2x2 MLF
MIC5310-2.8/2.6YML MIC5310-MKYML
2.8V/2.6V
40C to +125C
8-Pin 2x2 MLF
MIC5310-2.8/2.8YML
MIC5310-MMYML
2.8V/2.8V
40C to +125C
8-Pin 2x2 MLF
MIC5310-2.85/2.85YML MIC5310-NNYML
2.85V/2.85V
40C to +125C
8-Pin 2x2 MLF
MIC5310-2.9/1.8YML
MIC5310-OGYML
2.9V/1.8V
40C to +125C
8-Pin 2x2 MLF
MIC5310-2.9/2.9YML
MIC5310-OOYML
2.9V/2.9V
40C to +125C
8-Pin 2x2 MLF
MIC5310-3.0/1.8YML MIC5310-PGYML
3.0V/1.8V
40C to +125C
8-Pin 2x2 MLF
MIC5310-3.0/2.6YML
MIC5310-PKYML
3.0V/2.6V
40C to +125C
8-Pin 2x2 MLF
MIC5310-3.0/2.85YML MIC5310-PNYML
3.0V/2.85V
40C to +125C
8-Pin 2x2 MLF
MIC5310-3.0/3.0YML
MIC5310-PPYML
3.0V/3.0V
40C to +125C
8-Pin 2x2 MLF
MIC5310-3.3/1.8YML MIC5310-SGYML
3.3V/1.8V
40C to +125C
8-Pin 2x2 MLF
MIC5310-3.3/2.6YML
MIC5310-SKYML
3.3V/2.6V
40C to +125C
8-Pin 2x2 MLF
MIC5310-3.3/2.8YML MIC5310-SMYML
3.3V/2.8V
40C to +125C
8-Pin 2x2 MLF
MIC5310-3.3/3.0YML
MIC5310-SPYML
3.3V/3.0V
40C to +125C
8-Pin 2x2 MLF
MIC5310-3.3/3.2YML MIC5310-SRYML
3.3V/3.2V
40C to +125C
8-Pin 2x2 MLF
MIC5310-3.3/3.3YML
MIC5310-SSYML
3.3V/3.3V
40C to +125C
8-Pin 2x2 MLF
Other voltage options available. Contact Micrel for more details.
Micrel, Inc.
MIC5310
April 2006
4
M9999-042406
(408) 955-1690
Pin Configuration
8-Pin 2mm 2mm MLF (ML)
1
VIN
GND
BYP
EN2
8
VOUT1
VOUT2
NC
EN1
7
6
5
2
3
4
Top View
Pin Description
Pin Number
MLF-8
Pin Name
Pin Function
1 VIN
Supply
Input.
2 GND
Ground
3 BYP
Reference Bypass: Connect external 0.1F to GND to reduce output noise.
May be left open when bypass capacitor is not required.
4 EN2
Enable Input (regulator 2). Active High Input. Logic High = On; Logic Low = Off;
Do not leave floating.
5 EN1
Enable Input (regulator 1). Active High Input. Logic High = On; Logic Low = Off;
Do not leave floating.
6
NC
Not internally connected
7
VOUT2
Regulator Output LDO2
8
VOUT1
Regulator Output LDO1
Micrel, Inc.
MIC5310
April 2006
5
M9999-042406
(408) 955-1690
Absolute Maximum Ratings
(1)
Supply Voltage (V
IN
) .....................................0V to +6V
Enable Input Voltage (V
EN
)...........................0V to +6V
Power Dissipation...........................Internally Limited
(3)
Lead Temperature (soldering, 3sec ...................260C
Storage Temperature (T
S
)................. -65C to +150C
ESD Rating
(4)
.........................................................2kV
Operating Ratings
(2)
Supply voltage (V
IN
)............................... +2.3V to +5.5V
Enable Input Voltage (V
EN
).............................. 0V to V
IN
Junction Temperature ......................... -40C to +125C
Junction Thermal Resistance
MLF-8
(
JA
) ............................................... 90C/W
Electrical Characteristics
(5)
V
IN
= EN1 = EN2 = V
OUT
+ 1.0V; higher of the two regulator outputs, I
OUTLDO1
= I
OUTLDO2
= 100A; C
OUT1
= C
OUT2
= 1F;
C
BYP
= 0.1F; T
J
= 25C,
bold values indicate 40C T
J
+125C, unless noted.
Parameter Conditions
Min
Typ
Max
Units
Variation from nominal V
OUT
-2.0
+2.0
%
Output Voltage Accuracy
Variation from nominal V
OUT
; 40C to +125C
-3.0
+3.0
%
Line Regulation
V
IN
= V
OUT
+ 1V to 5.5V; I
OUT
= 100A
0.02
0.3
0.6
%/V
%/V
Load Regulation
I
OUT
= 100A to 150mA
0.5
2.0
%
Dropout Voltage (Note 6)
I
OUT
= 100A
I
OUT
= 50mA
I
OUT
= 100mA
I
OUT
= 150mA
0.1
12
25
35
50
75
100
mV
mV
mV
mV
Ground Current
EN1 = High; EN2 = Low; I
OUT
= 100A to 150mA
EN1 = Low; EN2 = High; I
OUT
= 100A to 150mA
EN1 = EN2 = High; I
OUT1
= 150mA, I
OUT2
= 150mA
85
85
150
120
120
190
A
A
A
Ground Current in Shutdown
EN1 = EN2 = 0V
0.01
2
A
Ripple Rejection
f = 1kHz; C
OUT
= 1.0F; C
BYP
= 0.1F
f = 20kHz; C
OUT
= 1.0F; C
BYP
= 0.1F
70
65
dB
dB
Current Limit
V
OUT
= 0V
300
550
950
mA
Output Voltage Noise
C
OUT
= 1.0 F; C
BYP
= 0.1F; 10Hz to 100kHz
30
V
RMS
Enable Inputs (EN1 / EN2)
Logic Low
0.2
V
Enable Input Voltage
Logic High
1.1
V
V
IL
0.2V
0.01
A
Enable Input Current
V
IH
1.0V
0.01
A
Turn-on Time (See Timing Diagram)
Turn-on Time (LDO1 and 2)
C
OUT
= 1.0F; C
BYP
= 0.01F
30
100
s
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 T
A
(ambient temperature) is P
D(max)
= (T
J(max)
T
A
) /
JA
. 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 V
OUT
. 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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