MIC2826
Quad Output PMIC with HyperLight Load™ DC-
DC, three LDOs, and I
2
C Control
General Description
The Micrel MIC2826 is a four output, programmable Power
Management IC, optimized for high efficiency power
support in Mobile Application Processors, Co-Processors,
DSPs, GPS and Media Player chipsets. The device
integrates a single 500mA PWM/PFM synchronous buck
(step-down) regulator with three Low Dropout Regulators
and a 400kHz I²C interface that provides programmable
Dynamic Voltage Scaling (DVS), Power Sequencing, and
individual output Enable/Disable controls allowing the user
to optimally control all four outputs.
The 4MHz synchronous buck regulator features a patented
HyperLight Load™ (HLL) architecture which minimizes
switching losses and provides low quiescent current
operation for high efficiency at light loads. Additional
benefits of this proprietary architecture are low output
ripple voltage and fast transient response throughout the
entire load range with the use of small output capacitors,
reducing the overall system size.
Three high performance LDOs are integrated into the
MIC2826 to provide additional system voltages for I/O,
memory and other analog functions. Each LDO is capable
of sourcing 150mA output current with high PSRR and low
output noise. A 2% output voltage accuracy, low dropout
voltage (150mV @ 150mA), and low ground current of
116µA (all three LDOs operating) makes this device ideally
suited for mobile applications.
The MIC2826 is available in a tiny 14-pin 2.5mm x 2.5mm
Thin MLF
®
with a junction operating range from -40°C to
+125°C.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
•
•
•
•
•
•
•
Fast-mode I
2
C control interface
Tiny 14-pin 2.5mm x 2.5mm MLF
®
package
Default start-up voltage states and sequencing
Fault indication processor flag - IRQb
-40°C to 125°C junction temperature range
Thermal shutdown and current-limit protection
Power On After Fault (POAF) function
DC-DC Synchronous Buck
•
2.7V to 5.5V input voltage range
•
500mA continuous output current
•
HyperLight Load™ mode
– 25µA quiescent current
•
90% peak efficiency; 85% at 1mA
•
Ultra-fast transient response
•
Dynamic Voltage Scaling (DVS) range: 0.8V to 1.8V
– 0.8V to 1.2V in 25mV steps
– 1.2V to 1.8V in 50mV steps
•
±2% initial accuracy
•
Low output voltage ripple: 20mVpp in HyperLight
Load™ mode, 3mV in full PWM mode
LDOs
•
1.8V to V
DVIN
input voltage range
•
150mA output current (each LDO)
•
Dynamic Voltage Scaling (each LDO)
–
DVS range: 0.8V to 3.3V in 50mV steps
•
±2% initial accuracy
•
Low quiescent current – 50µA (each LDO)
•
Low dropout voltage – 50mV @ 50mA
•
Low output noise - 45µV
RMS
•
Stable with ceramic output capacitors
•
65dB PSRR at 1kHz
Applications
•
•
•
•
•
•
Application processors
GPS subsystems
General purpose PMIC
Mobile phones / PDAs
Portable media players
Mobile television receivers
HyperLight Load 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
July 2009
M9999-071609-A
Micrel, Inc.
MIC2826
Pin Configuration
14-Pin 2.5mm x 2.5mm Thin MLF
®
(MT)
(Top View)
Pin Description
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
Pin Name
LDO1OUT
LDO2OUT
LDO23IN
LDO3OUT
IRQb
SW
DGND
DVIN
SDA
SCL
FB
AGND
EN
Pin Function
Output of LDO1: Requires a minimum 1µF ceramic capacitor-to-AGND.
Output of LDO2: Requires a minimum 1µF ceramic capacitor-to-AGND.
External Input Supply Rail to LDO2 and LDO3. Requires a minimum 1µF ceramic
capacitor to AGND.
Output of LDO3: Connect a minimum 1µF ceramic capacitor to AGND.
Fault Output (open drain).
Switch (Output): Internal power MOSFET output switches.
Switch Ground Pin.
Input Voltage: Requires a close minimum 2.2µF ceramic capacitor to DGND.
Fast-mode 400kHz I²C Data Input/Output pin.
Fast-mode 400kHz I²C Clock Input pin.
Feedback Pin Connected to VOUT to sense output voltage.
Analog Ground. Must be connected externally to DGND.
Enable (Input): Executes default startup sequence. Active High. HIGH = ON,
LOW = OFF. Do not leave floating. The EN pin function is optional if I
2
C control
is used for startup and shutdown.
External Input Supply Rail to LDO1. Requires a minimum 1µF ceramic capacitor
to AGND.
Exposed Heat-Sink Pad.
14
EP
LDO1IN
HS PAD
July 2009
4
M9999-071609-A
Micrel, Inc.
MIC2826
Absolute Maximum Ratings
(1)
Supply Voltage (V
DVIN
, V
LDO1IN
, V
LDO23IN
) .......... -0.3V to +6V
Enable Voltage (V
EN
) ....................................... -0.3V to +6V
I
2
C Voltage (V
SDA
, V
SCL
) ................................... -0.3V to +6V
Power Dissipation ................................. Internally Limited
(3)
Lead Temperature (Soldering, 10 sec.) ..................... 260°C
Storage Temperature (T
S
)...................–65°C
≤
T
J
≤
+150°C
ESD Rating
(4)
................................................................. 2kV
Operating Ratings
(2)
DVIN Supply voltage (V
DVIN
)......................... +2.7V to +5.5V
LDO Supply voltage (V
LDO1IN
, V
LDO23IN
)...........+1.8V to V
DVIN
Enable Input Voltage (V
EN
)..................................0V to V
DVIN
I
2
C Voltage (V
SDA
, V
SCL
) .................................... 0V to +5.5V
Junction Temperature Range (T
J
)............. –40°C to +125°C
Junction Thermal Resistance
2.5mm x 2.5mm Thin MLF-14 (θ
JA
) ...................89°C/W
Electrical Characteristics
(5)
– DC/DC Converter
DVIN = EN = 3.6V; LDO1, LDO2, LDO3 disabled; L=1µH, C
OUT
=4.7µF, I
OUT
= 20mA, T
A
= 25°C, unless otherwise
specified.
Bold
values indicate -40°C≤T
J
≤+125°C.
Parameter
Supply Voltage Range
Under-Voltage Lockout
Threshold
Switcher Quiescent Current,
HLL
Shutdown Current
Output Voltage Accuracy
Current Limit in PWM Mode
Output Voltage Line Regulation
Output Voltage Load Regulation
PWM Switch ON-Resistance
Frequency
SoftStart Time
Enable Voltage
Enable Input Current
Over-temperature Shutdown
Over-temperature Shutdown
Hysteresis
VPOR Threshold
% of V
OUT
below Nominal
Auto-Discharge NFET
resistance
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, 1.5kΩ in series with 100pF.
5. Specification for packaged product only.
Conditions
Rising
I
OUT
= 0mA, FB > 1.2 * V
OUT
Nominal
EN = 0V, DVIN = 5.5V
DVIN = 3.6V; I
LOAD
= 20mA
FB = 0.9* V
OUT
(NOM)
DVIN = 3.0V to 5.5V, I
LOAD
= 20mA
20mA < I
LOAD
< 500mA, DVIN = 3.6V
I
SW
= 100mA PMOS
I
SW
= -100mA NMOS
I
LOAD
= 120mA
V
OUT
= 90%
OFF
ON
Min
2.7
2.45
Typ
Max
5.5
Units
V
V
µA
µA
%
A
%/V
%
Ω
Ω
MHz
µs
2.55
25
2
2.65
35
5
+3
-3
0.55
1
0.4
0.5
0.55
0.6
4
300
0.2
1.2
0.1
160
20
2
V
µA
°C
°C
%
%
Ω
V
OUT
Ramping Up
V
OUT
Ramping Down
91
89
280
July 2009
5
M9999-071609-A
微控制器 MCU
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