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MIC5312-GPYML-TR

P1-P3P4-P6P7-P9P10-P11
MIC5312
LowQ™ Mode Dual 300mA LDO
with Integrated POR
MLF and MicroLeadFrame are 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
February 2005
M9999-021105
(408) 955-1690
General Description
The MIC5312 is a high performance, dual µCap low
dropout regulator with integrated power-on reset
supervisor, offering ultra-low operating current and a
second, even lower operating current mode, LowQ™
mode, reducing operating current by 75%. Each
regulator can source up to 300mA of output current
maximum.
Ideal for battery operated applications, the MIC5312
offers 1% accuracy, extremely low dropout voltage
(60mV @ 150mA), and low ground current (typically
28µA total). When put into LowQ™ mode, the internal
current draw drops down to 7µA total. The MIC5312
also comes equipped with a TTL logic compatible
enable pin that allows the part to be put into a zero-off-
mode current state, drawing no current when disabled.
The Power-on Reset is active low and indicates an
output undervoltage condition on either regulator 1 or 2
when the regulator is enabled.
The MIC5312 is a µCap design, operating with very
small ceramic output capacitors for stability, reducing
required board space and component cost.
The MIC5312 is available in fixed output voltages in the
3mm x 3mm MLF-10 leadless package. Data sheets
and support documentation can be found on Micrel’s
web site at www.micrel.com.
Features
• Input voltage range: 2.5V to 5.5V
• LowQ™ Mode
- 7µA total quiescent current
- 10mA output current capable LowQ™ mode
- Logic level control with external pin
• Stable with ceramic output capacitor
• 2 LDO Outputs – 300mA each
• Integrated Power-on Reset (POR) with adjustable
delay time
• Tiny 3mm x 3mm MLF™-10 package
• Low dropout voltage of 60mV @ 150mA
• Ultra-low quiescent current of 28µA total in Full
Current Mode
• High output accuracy
- ±1.0% initial accuracy
- ±2.0% over temperature
• Thermal Shutdown Protection
• Current Limit Protection
Applications
• Cellular/PCS phones
• Wireless modems
• PDAs
• MP3 Players
Typical Application
V
IN
EN1
EN2
LOWQ
BYP
Baseband
µProcessor
V
OUT1
V
CORE
V
OUT2
POR
V
I/O
GND
SET
MIC5312-xxBML
Micrel, Inc. MIC5312
February 2005
2
M9999-021105
(408) 955-1690
Ordering Information
Part Number
Output
Voltage*
Junction Temp. Range Package
MIC5312-GMBML 1.8V/2.8V –40°C to +125°C 10-Pin 3×3 MLF™
MIC5312-DKBML 1.85V/2.6V –40°C to +125°C 10-Pin 3×3 MLF™
Note: *Other Voltage options available between 1.25V and 5V. Contact Micrel for details.
Pin Configuration
1V
IN
EN1
EN2
LOWQ
BYP
10 V
OUT1
V
OUT2
POR
SET
GND
9
8
7
6
2
3
4
5
MIC5312-xxBML (3x3)
Pin Description
Fixed Pin Name Pin Function
1 V
IN
Supply Input. (V
IN1
and V
IN2
are internally tied together)
2 EN1 Enable Input (regulator 1). Active High Input. Logic High = On; Logic Low = Off;
Do not leave floating
3 EN2 Enable Input (regulator 2). Active High Input. Logic High = On; Logic Low = Off;
Do not leave floating
4 LowQ™ LowQ™ Mode. Active Low Input. Logic High = Full Power Mode; Logic Low = Light
Load Mode; Do not leave floating.
5 BYP Reference Bypass: Connect external 0.01µF to GND to reduce output noise. May
be left open.
6 GND Ground.
7 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. Delay
= 1µs/1pF
8 POR Power-On Reset Output: Open-drain output. Active low indicates an output
undervoltage condition on either regulator 1 or regulator 2 when device is enabled.
9 V
OUT
2 Output of regulator 2
10 V
OUT
1 Output of regulator 1
EP GND Ground. Internally connected to the Exposed Pad.
Micrel, Inc. MIC5312
February 2005
3
M9999-021105
(408) 955-1690
Absolute Maximum Ratings
(1)
Supply Input Voltage (V
IN
).............................. 0V to 6V
Enable Input Voltage (V
EN
)............................. 0V to 6V
LowQ™ Input Voltage (V
LowQ™
)...................... 0V to 6V
Power Dissipation (P
D
) ..................Internally Limited
(3)
Junction Temperature ....................... -40°C to +125°C
Lead Temperature (soldering, 5sec.).................260°C
Storage Temperature (T
s
) ................. -65°C to +150°C
Operating Ratings
(2)
Supply Input Voltage (V
IN
)..........................2.5V to 5.5V
Enable Input Voltage (EN1/EN2/LowQ™) ...... 0V to V
IN
Junction Temperature (T
J
) .................. -40°C to +125°C
Package Thermal Resistance
MLF-10 (θ
JA
) ................................................. 63°C/W
Electrical Characteristics (Full Power Mode)
V
IN
= V
OUT
+ 1.0V for higher output of the regulator pair; LowQ™ = V
IN
; C
OUT
= 2.2µF, I
OUT
= 100µA; T
J
= 25°C, bold
values indicate -40°C to +125, unless noted.
Parameter Conditions Min Typ Max Units
Variation from nominal V
OUT
-1.0 +1.0 % Output Voltage Accuracy
Variation from nominal V
OUT
; -40°C to +125°C
-2.0 +2.0
%
Line Regulation
V
IN
= V
OUT
+1V to 5.5V
0.02
0.3
0.6
%/V
Load Regulation
I
OUT
= 100µA to 150mA
I
OUT
= 100µA to 300mA
0.35
0.7
1.0
1.5
%
%
Dropout Voltage
I
OUT
= 150mA
I
OUT
= 300mA
60
120
240
mV
mV
Ground Pin Current
I
OUT
1 = I
OUT
2 = 100µA to 300mA
28
45
50
µA
µA
Ground Pin Current in
Shutdown
V
EN
< 0.2V
0.1
µA
Ripple Rejection
f = up to 1kHz; C
OUT
= 2.2µF ceramic; C
BYP
= 10nF
f = 1kHz – 20kHz; C
OUT
= 2.2µF ceramic; C
BYP
= 10nF
65
35
dB
dB
Current Limit
V
OUT
= 0V (Both Regulators)
350 450 700 mA
Output Voltage Noise
C
OUT
= 2.2µF, C
BYP
= 0.01µF, 10Hz to 100kHz
45 µVrms
Enable and LowQ™ Input (EN1/EN2/LowQ™)
Logic Low
0.2
V
Enable Input Voltage
Logic High
1.0
V
V
IL
< 0.2V 0.1
1
µA Enable Input Current
V
IH
> 1.0V 0.1
1
µA
Turn-on Time
C
OUT
= 2.2µF; C
BYP
= 0.01µF
300
500
µs
Light Load Response
Into Light Load
50
µs
Response Time
(4)
Out of Light Load
50
µs
POR Output
Low Threshold, % of V
OUT
(Flag ON)
90
%
VTH
High Threshold, % of V
OUT
(Flag OFF)
97 %
VOL POR Output Logic Low Voltage; I
L
= 250µA
0.01 0.1 V
IPOR Flag Leakage Current, Flag OFF
–1 0.01 +1 µA
SET INPUT
SET Pin Current Source V
SET
= 0V 0.75 1.25 1.75 µA
SET Pin Threshold Voltage
1.25
V
P1-P3P4-P6P7-P9P10-P11

MIC5312-GPYML-TR

Mfr. #:
Buy MIC5312-GPYML-TR
Manufacturer:
Microchip Technology / Micrel
Description:
LDO Voltage Regulators Portable Power LowQ, Dual uCap LDO w/Integrated POR
Lifecycle:
New from this manufacturer.
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