MIC5322
Dual, High Performance 150mA
µCap ULDO™
General Description
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 2.56mm
2
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.
Features
•
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
VOUT 1
VOUT 2
1µF
EN
BYP
0.01µF
GND
1µF
1µF
GPS
Module
RF
Core
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
M9999-051508-B
Micrel, Inc.
MIC5322
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) ..................260°C
Storage Temperature (T
S
) ................ –65°C to +150°C
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 (T
J
) ................. –40°C to +125°C
Junction Thermal Resistance
6-pin 1.6mmx1.6mm Thin MLF
®
(θ
JA
) .... 100°C/W
Electrical Characteristics
(5)
V
IN
= V
OUT
+ 1.0V; higher of the two regulator outputs, I
OUTLDO1
= I
OUTLDO2
= 100µA; V
/EN
= 0V; C
OUT1
= C
OUT2
= 1µF;
C
BYP
= 0.01µF; T
J
= 25°C,
bold
values indicate –40°C
≤
T
J
≤
+125°C, unless noted.
Parameter
Output Voltage Accuracy
Line Regulation
Load Regulation
Dropout Voltage
(6)
Conditions
Variation from nominal V
OUT
Variation from nominal V
OUT
; –40°C to +125°C
V
IN
= V
OUT
+ 1V to 5.5V; I
OUT
= 100µA
I
OUT
= 100µA to 150mA
I
OUT
= 100µA
I
OUT
= 50mA
I
OUT
= 100mA
I
OUT
= 150mA
Min
-2.0
Typ
Max
+2.0
Units
%
%
%/V
%/V
%
mV
mV
mV
mV
µA
µA
dB
dB
-3.0
0.02
0.5
0.1
12
25
35
150
0.01
75
45
+3.0
0.3
0.6
2.0
50
75
100
190
2
Ground Current
Ground Current in Shutdown
Ripple Rejection
Current Limit
Output Voltage Noise
V
/EN
= Low; I
OUT1
= 150mA; I
OUT2
= 150mA
V
/EN
= High
f = 1kHz; C
OUT
= 1.0µF; C
BYP
= 0.1µF
f = 20kHz; C
OUT
= 1.0µF; C
BYP
= 0.1µF
V
OUT
= 0V
C
OUT
= 1.0µF; C
BYP
= 0.01µF; 10Hz to 100kHz
Logic Low
Logic High
300
550
30
950
mA
µV
RMS
Enable Inputs (/EN)
Enable Input Voltage
Enable Input Current
0.2
1.2
0.01
0.01
40
45
1
1
V
V
µA
µA
µs
µs
V
IL
≤
0.2V
V
IH
≥
1.2V
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 T
A
(ambient temperature) is P
D(max)
= (T
J(max)
– T
A
) /
θ
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 it’s nominal V
OUT
. For outputs below 2.3V,
the dropout voltage is the input-to-output differential with the minimum input voltage 2.3V
C
OUT
= 1.0µF; No C
BYP
C
OUT
= 1.0µF; C
BYP
= 0.01µF
100
100
May 2008
3
M9999-051508-B
编程基础
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
