MIC2810
Digital Power Management IC 2 MHz, 600 mA DC/DC with Dual
300 mA/300 mA Low V
IN
LDOs
Features
•
•
•
•
•
•
2.7V to 5.5V Input Voltage Range
2 MHz DC/DC Converter and Two LDOs
Integrated Power-on Reset (POR)
Adjustable POR Delay Time
LOWQ Mode
- 30 µA Total I
Q
When in LOWQ Mode
DC/DC Converter
- Up to 600 mA of Output Current in PWM
Mode
- LOWQ Mode: No Ripple Light Load Mode
- 53 µV
RMS
Output Noise in LOWQ Mode
- 2 MHz PWM Mode Operation
- >90% Efficiency
LDO1
- 1.65V to 5.5V Input Voltage Range
- 300 mA Output Current
- Output Voltage Down to 0.8V
LDO2
- 2.7V to 5.5V Input Voltage Range
- 300 mA Output Current
- Output Voltage Down to 0.8V
Thermal Shutdown Protection
Current-Limit Protection
Simple, Leakage-Free Interfacing to Host MPU in
Applications with Backup Power
Tiny 16-Pin 3 mm x 3 mm QFN Package
General Description
The MIC2810 is a high performance power
management IC, featuring three output voltages with
independent enable control: a 2 MHz DC/DC converter
and two 300 mA LDOs. The MIC2810 features a
LOWQ mode, reducing the total current draw while in
this mode to less than 30 µA. In LOWQ mode, the
output noise of the DC/DC converter is 53 µV
RMS
,
significantly lower than other converters that use a
PFM light load mode that can interfere with sensitive
RF circuitry.
The DC/DC converter uses small values of L and C to
reduce board space but still retains high efficiency over
a wide load range, while supporting load currents up to
600 mA.
The LDOs operate with very small ceramic output
capacitors for stability, therefore, reducing required
board space and component cost. It is available in
various output voltage options in the 16-pin 3 mm x
3 mm QFN leadless package.
•
•
Package Type
MIC2810
16-P
IN
3 mm
X
3 mm QFN
Pin 16
Pin 15
Pin 14
EN1
Pin 13
CSET
•
•
•
•
EN2
EN
Applications
•
•
•
•
Embedded MPU and MCU Power
Portable and Wearable Applications
Low-Power RF Systems
Backup Power Systems
Pin 1
Pin 2
Pin 3
Pin 4
LOWQ
BIAS
SGND
PGND
VIN2
LDO2
SW
VIN
POR
LDO1
VIN1
LDO
Pin 12
Pin 11
Pin 10
Pin 9
Pin 5
Pin 6
2017 Microchip Technology Inc.
Pin 7
Pin 8
DS20005910A-page 1
MIC2810
Typical Application Circuit (simplified)
Functional Diagram
VIN
BIAS
SW
DC/DC
LDO
EN
/LOWQ
VIN1
EN1
VIN2
LDO1
LDO1
EN2
LDO2
LDO2
REFERENCE AND
QUICK START
POR
LOGIC
C
SET
POR
PGND
SGND
DS20005910A-page 2
2017 Microchip Technology Inc.
MIC2810
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Supply Voltage (V
IN
, V
IN1
, V
IN2
)..................................................................................................................... 0V to +6.0V
Enable Input Voltage (V
EN
, V
EN1,
V
EN2
)..............................................................................................................0V to V
IN
Power Dissipation (Note
1)
.................................................................................................................... Internally Limited
ESD Rating (Note
2)
.................................................................................................................................................. 2 kV
Operating Ratings ‡
Supply Voltage (V
IN
, V
IN2
)......................................................................................................................... +2.7V to +5.5V
Supply Voltage (V
IN1
).............................................................................................................................. +1.65V to +5.5V
Enable Input Voltage (V
EN
, V
EN1,
V
EN2
)........................................................................................................... 0V to +V
IN
† Notice:
Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of the device at those or any other conditions above those indicated
in the operational sections of this specification is not intended. Exposure to maximum rating conditions for extended
periods may affect device reliability.
‡ Notice:
The device is not guaranteed to function outside its operating ratings.
1:
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.
2:
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5 kΩ in series with
100 pF.
2017 Microchip Technology Inc.
DS20005910A-page 3
MIC2810
TABLE 1-1:
ELECTRICAL CHARACTERISTICS (Note
1)
Electrical Characteristics:
V
IN
= EN1 = EN2 = LOWQ = V
OUT
(Note
2)
+ 1V; C
OUTDC/DC
= 2.2 µF, C
LDO1
= C
LDO2
=
2.2 µF; I
OUTDC/DC
= 100 mA; I
OUTLDO1
= I
OUTLDO2
= 100 µA; T
J
= 25°C,
bold
values indicate –40°C
≤
T
J
≤
+125°C;
unless noted.
Parameter
UVLO Threshold
UVLO Hysteresis
Ground Pin Current
Ground Pin Current in
Shutdown
Symbol
UVLO
TH
UVLO
HYS
I
GND
I
GND_SHDN
Min.
2.45
—
—
—
—
—
—
Ground Pin Current
(LOWQ mode)
—
I
GND_LOWQ
Typ.
2.55
100
800
55
—
0.2
30
—
20
160
23
Max.
2.65
—
1100
85
95
5
60
80
Units
V
mV
µA
—
Conditions
Rising input voltage during turn-on
V
FB
= GND (not switching)
LDO1 or LDO2 (EN = GND; EN1 or
EN2 = GND)
EN = EN1 = EN2 = 0V
All channels on, I
DC/DC
= I
LDO1
=
I
LDO2
= 0 mA (LOWQ = GND)
µA
µA
—
70
—
—
°C
°C
LDO1 or LDO2 (EN = GND; EN1 or
EN2 = GND);
I
OUT
= 0 mA (LOWQ = GND)
—
—
Overtemperature
Shutdown
Overtemperature
Shutdown Hysteresis
T
SD
T
SDHYS
V
IH
V
IL
I
ENLK
—
—
Enable Inputs (EN; EN1; EN2; LOWQ)
Enable Input Voltage
Enable Input Current
Turn-on Time
Turn-on Time
(LDO1 and LDO2)
Turn-on Time (DC/DC)
POR Output
POR Threshold Voltage,
Falling
POR Threshold Voltage,
Rising
VOL
IPOR
SET INPUT
SET Pin Current Source
SET Pin Threshold
Voltage
Note 1:
2:
I
SET
VTH
SET
0.75
—
1.25
1.25
1.75
—
µA
V
V
SET
= 0V
POR = High
V
THLOW_POR
90
91
—
%
Low Threshold, % of nominal
(V
DC/DC
or V
LDO1
or V
LDO2
) (Flag
ON)
High Threshold, % of nominal
(V
DC/DC
and V
LDO1
and V
LDO2
)
(Flag OFF)
POR Output Logic Low Voltage; I
L
=
250 µA
Flag Leakage Current, Flag OFF
t
TURN-ON
t
TURN-ON
—
—
240
83
500
350
µs
µs
—
(LOWQ = V
IN
; I
LOAD
= 300 mA);
(LOWQ = GND; I
LOAD
= 10 mA)
—
1.0
—
—
—
—
0.1
0.1
0.2
—
1
1
V
V
µA
µA
Logic Low
Logic High
V
IL
≤
0.2V
V
IH
≥
1.0V
V
THIGH_POR
VOL
POR
ILEAK
POR
—
—
—
96
10
0.01
99
100
1
%
mV
µA
Specification for packaged product only.
V
OUT
denotes the highest of the three output voltages of DC/DC, LDO1 and LDO2.
DS20005910A-page 4
2017 Microchip Technology Inc.
MIC2810
TABLE 1-2:
ELECTRICAL CHARACTERISTICS - DC/DC CONVERTER
Electrical Characteristics:
V
IN
= V
OUTDC/DC
+ 1V; EN1 = V
IN
; EN2 = GND; I
OUTDC/DC
= 100 mA; L = 2.2 µH;
C
OUTDC/DC
= 2.2 µF; T
J
= 25°C,
bold
values indicate –40°C to + 125°C; unless noted.
Parameter
Symbol
Min.
–2
–3
—
Typ.
—
—
0.2
Max.
2
3
—
Units
Conditions
LOWQ = High (Full Power Mode)
Output Voltage Accuracy
Output Voltage Line
Regulation
Output Voltage Load
Regulation
Maximum Duty Cycle
PWM Switch
ON-Resistance
Oscillator Frequency
Current Limit in PWM
Mode
V
OUT
(∆V
OUT
/V
OUT
)
/∆V
IN
%
Nominal V
OUT
tolerance
V
OUT
> 2.4V; V
IN
= V
OUT
+ 300 mV
to 5.5V, I
LOAD
= 100 mA
V
OUT
< 2.4V; V
IN
= 2.7V to 5.5V,
I
LOAD
= 100 mA
20 mA < I
LOAD
< 600 mA
V
FB
≤
0.4V
I
SW
= 150 mA, V
FB
= 0.7V
FB_NOM
PMOS
I
SW
= –150 mA, V
FB
= 1.1V
FB_NOM
NMOS
—
V
FB
= 0.9 * V
NOM
Variation from nominal V
OUT
%/V
∆V
OUT
/V
OUT
DC
MAX
—
—
100
—
—
0.1
—
0.5
0.6
2
1
—
—
—
—
2.2
1.6
%
%
Ω
Ω
MHz
A
f
osc
—
1.8
0.75
LOWQ = Low (Light Load Mode)
–2
Output Voltage Accuracy
V
OUT
(∆V
OUT
/V
OUT
)
/∆V
IN
—
—
0.02
—
0.4
45
120
53
2
3
0.3
0.6
1.5
—
190
—
%
–3
—
—
—
—
80
—
Variation from nominal V
OUT
;
–40°C to +125°C
V
IN
= V
OUT
+ 1V to 5.5V;
I
OUT
= 100 µA
I
OUT
= 100 µA to 50 mA
f = up to 1 kHz
V
OUT
= 0V
10 Hz to 100 kHz
Line Regulation
Load Regulation
Ripple Rejection
Current Limit
Output Voltage Noise
%/V
%
dB
mA
µV
RMS
∆V
OUT
/V
OUT
PSRR
I
LIM_LOWQ
V
N
2017 Microchip Technology Inc.
DS20005910A-page 5
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