MIC5376/7/8
High Performance Low Dropout 150 mA LDO
Features
General Description
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The MIC5376, MIC5377, and MIC5378 are advanced,
general purpose linear regulators that offer low dropout
in ultra-small packages. The MIC5376 provides a fixed
output voltage in a 1 mm x 1 mm UDFN package while
the MIC5377 and MIC5378 provide adjustable output
voltages in a 1.2 mm x 1.2 mm Thin QFN package.
When the MIC5376 or MIC5378 are disabled, an
internal resistive load is automatically applied to the
output to discharge the output capacitor. The
MIC5376/7/8 are capable of sourcing 150 mA output
current with low dropout, making it an ideal solution for
any portable electronic application.
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4-Lead 1 mm x 1 mm UDFN: MIC5376
8-Lead 1.2 mm x 1.2 mm Thin QFN: MIC5377/8
Low-Cost 5-Lead SC-70 Package Available
Low Dropout Voltage: 120 mV at 150 mA
Input Voltage Range: 2.5V to 5.5V
150 mA Guaranteed Output Current
Stable with 0402 Ceramic Capacitors as Low as
1 µF
Low Quiescent Current: 29 µA
Excellent Load/Line Transient Response
Fixed Output Voltages: MIC5376
Adjustable Output Voltages: MIC5377/8
Output Discharge Circuit: MIC5376/8
High Output Accuracy
- ±2% Initial Accuracy
Thermal Shutdown and Current Limit Protection
Ideal
for
battery-powered
applications,
the
MIC5376/7/8 offer 2% initial accuracy, low dropout
voltage (120 mV at 150 mA), and ground current
(typically 29 µA). The MIC5376/7/8 can also be put into
a zero-off-mode current state, drawing virtually no
current when disabled.
The MIC5376 is available in lead-free (RoHS
compliant) 1 mm x 1 mm UDFN and SC-70-5
packages. The MIC5377/8 are available in lead-free
(RoHS compliant) 1.2 mm x 1.2 mm Thin QFN and
SC-70-5 packages.
Applications
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Mobile Phones
Digital Cameras
GPS, PDAs, PMP, Handhelds
Portable Electronics
The MIC5376/7/8 have an operating
temperature range of –40°C to 125°C.
junction
Typical Application Circuit
MIC5376-xxYMT
VIN
VOUT
1μF
EN
VOUT = 2.8V
1μF
VBAT
GND
2018 - 2022 Microchip Technology Inc. and its subsidiaries
DS20006080B-page 1
MIC5376/7/8
Package Types
MIC5376 (Fixed Output)
5-Lead SC-70 (C5)
(Top View)
MIC5376 (Fixed Output)
4-Lead 1 mm x 1 mm UDFN (MT)
(Top View)
VIN
4
EN GND VIN
1
2
3
EN
3
1
2
VOUT
GND
4
NC
MIC5377/8 (Adjustable Output)
5-Lead SC-70 (C5)
(Top View)
MIC5377/8 (Adjustable Output)
8-Lead 1.2 mm x 1.2 mm TQFN (MT)
(Top View)
EN 1
8
VIN 2
VOUT 3
5
VOUT
EN GND VIN
1
2
3
7 ADJ
6 GND
4
5 GND
4
ADJ
5
VOUT
Functional Block Diagram
MIC5376 Block Diagram
VIN
EN
VOUT
LDO
Auto
Discharge
Reference
GND
MIC5377/8 Block Diagram
VIN
EN
VOUT
LDO
ADJ
Auto
Discharge*
Reference
*MIC5378 Only
GND
DS20006080B-page 2
2018 - 2022 Microchip Technology Inc. and its subsidiaries
MIC5376/7/8
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Supply Voltage (VIN) ......................................................................................................................................... 0V to +6V
Enable Voltage (VEN) ..........................................................................................................................................0V to VIN
Power Dissipation (PD) (Note 1) ............................................................................................................ Internally Limited
Lead Temperature (Soldering, 5 sec.)................................................................................................................... +260°C
Junction Temperature (TJ)...................................................................................................................... –40°C to +125°C
Storage Temperature (TS)...................................................................................................................... –65°C to +150°C
ESD Rating (Note 2) .................................................................................................................................................. 2 kV
Operating Ratings ††
Supply Voltage (VIN) ..................................................................................................................................... 2.5V to 5.5V
Enable Voltage (VEN) ..........................................................................................................................................0V to VIN
Junction Temperature (TJ)...................................................................................................................... –40°C to +125°C
Package Thermal Resistance
1 mm x 1 mm UDFN-4 (JA) ...............................................................................................................................250°C/W
1.2 mm x 1.2 mm TQFN-8 (JA)..........................................................................................................................250°C/W
SC-70-5 (JA) ...................................................................................................................................................256.5°C/W
† 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.
Note 1: The maximum allowable power dissipation of any TA (ambient temperature) is PD(MAX) = (TJ(MAX) – TA)/θJA.
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 are recommended. Human body model, 1.5 kΩ in series
with 100 pF.
2018 - 2022 Microchip Technology Inc. and its subsidiaries
DS20006080B-page 3
MIC5376/7/8
ELECTRICAL CHARACTERISTICS
Electrical Characteristics: VIN = VEN = VOUT + 1V; CIN = COUT = 1 µF for VOUT ≥ 2.5V, CIN = COUT = 2.2 µF for
VOUT < 2.5V; IOUT = 100 µA; TJ = +25°C, bold values indicate –40°C to +125°C, unless noted. Note 1
Parameter
Output Voltage Accuracy
Sym.
VOUT
Min.
Typ.
Max.
–2.0
—
2.0
–3.0
—
3.0
Units
Conditions
%
Variation from nominal VOUT
Line Regulation
ΔVOUT/
VOUT
—
0.02
0.3
%
VIN = VOUT +1V to 5.5V; IOUT = 100 µA
Load Regulation (Note 2)
ΔVOUT/
VOUT
—
0.3
1.0
%
IOUT = 100 µA to 150 mA
Dropout Voltage (Note 3)
VDO
—
45
100
—
120
200
Ground Pin Current
(Note 4)
IGND
—
29
45
µA
IOUT = 0 mA
IGND-SHDN
—
0.05
1
µA
VEN ≤ 0.2V
—
60
—
—
50
—
ILIM
200
370
550
Output Voltage Noise
en
—
200
—
Auto-Discharge NFET
Resistance
RDS(ON)
—
30
—
Ω
VEN = 0V; VIN = 3.6V
VREF
0.97
1
1.03
V
—
IADJ-BIAS
—
0.01
—
µA
—
—
—
0.2
1.2
—
—
—
0.01
1
—
0.01
1
—
45
100
Ground Pin Current in
Shutdown
Ripple Rejection
Current Limit
PSRR
mV
dB
mA
IOUT = 50 mA
IOUT = 150 mA
f = 1 kHz; COUT = 1 µF
f = 10 kHz; COUT = 1 µF
VOUT = 0V
µVRMS COUT = 1 µF, 10 Hz to 100 kHz
Reference Voltage (MIC5377/8)
Reference Voltage
Accuracy
Adjust Pin Input Current
Enable Input
Enable Input Voltage
VEN
Enable Input Current
IEN
Turn-On Time
tON
Note 1:
2:
3:
4:
V
µA
µs
Logic low.
Logic high.
VIL ≤ 0.2V
VIH ≥ 1.2V
COUT = 1 µF; IOUT = 150 mA
Specification for packaged product only.
Regulation is measured at constant junction temperature using low duty cycle pulse testing.
Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below
its nominal value measured at 1V differential. For outputs below 2.5V, dropout voltage is the input-to-output differential with the minimum input voltage 2.5V.
Ground pin current is the regulator quiescent current. The total current drawn from the supply is the sum
of the load current plus the ground pin current.
DS20006080B-page 4
2018 - 2022 Microchip Technology Inc. and its subsidiaries
MIC5376/7/8
TEMPERATURE SPECIFICATIONS
Parameters
Sym.
Min.
Typ.
Max.
Units
Conditions
TJ
–40
—
+125
°C
—
Temperature Ranges
Junction Temperature Range
Lead Temperature
—
—
—
+260
°C
Soldering, 5 sec.
Storage Temperature
TS
–65
—
+150
°C
—
Thermal Resistance, 1x1 UDFN 4-Ld
JA
—
250
—
°C/W
—
Thermal Resistance, 1.2x1.2 TQFN
8-Ld
JA
—
250
—
°C/W
—
Thermal Resistance, SC-70-5
JA
—
256.5
—
°C/W
—
Package Thermal Resistances
Note 1:
The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable
junction temperature and the thermal resistance from junction to air (i.e., TA, TJ, JA). Exceeding the
maximum allowable power dissipation will cause the device operating junction temperature to exceed the
maximum +125°C rating. Sustained junction temperatures above +125°C can impact the device reliability.
2018 - 2022 Microchip Technology Inc. and its subsidiaries
DS20006080B-page 5
MIC5376/7/8
2.0
Note:
TYPICAL PERFORMANCE CURVES
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
FIGURE 2-1:
Ratio.
Power Supply Rejection
FIGURE 2-4:
Temperature.
Ground Current vs.
FIGURE 2-2:
Voltage.
Current Limit vs. Input
FIGURE 2-5:
Current.
Output Voltage vs. Load
FIGURE 2-3:
Current.
Ground Current vs. Output
FIGURE 2-6:
Current.
Dropout Voltage vs. Load
DS20006080B-page 6
2018 - 2022 Microchip Technology Inc. and its subsidiaries
MIC5376/7/8
FIGURE 2-7:
Voltage.
Output Voltage vs Supply
FIGURE 2-10:
Temperature.
Output Voltage vs
FIGURE 2-8:
Voltage.
Ground Current vs Supply
FIGURE 2-11:
Density.
Output Noise Spectral
FIGURE 2-9:
Temperature.
Dropout Voltage vs
FIGURE 2-12:
Enable Turn-On.
2018 - 2022 Microchip Technology Inc. and its subsidiaries
DS20006080B-page 7
MIC5376/7/8
FIGURE 2-13:
4.4V).
Line Transient 2.8V (3.4V to
FIGURE 2-14:
to 150 mA).
Load Transient 2.8V (1 mA
FIGURE 2-15:
(No Load).
MIC5376 Auto-Discharge
DS20006080B-page 8
2018 - 2022 Microchip Technology Inc. and its subsidiaries
MIC5376/7/8
3.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
PIN FUNCTION TABLE
Pin Number
MIC5376
UDFN 4-Ld
Pin Number
MIC5376
SC-70-5
Pin Number
MIC5377/8
TQFN 8-Ld
Pin Number
MIC5377/8
SC-70-5
Pin Name
3
3
1
3
EN
Enable Input. Active-High. High =
on, low = off. Do not leave floating.
4
1
2
1
VIN
Supply Input.
Description
1
5
3
5
VOUT
Output Voltage.
2
2
4, 5, 6, 8
2
GND
Ground.
—
—
7
4
ADJ
Adjust Pin: Feedback input from
external divider.
—
4
—
—
NC
No connection.
HS Pad
—
—
—
ePAD
2018 - 2022 Microchip Technology Inc. and its subsidiaries
Exposed Heat Sink Pad. Connected
to ground internally.
DS20006080B-page 9
MIC5376/7/8
4.0
APPLICATION INFORMATION
MIC5376, MIC5377, and MIC5378 are low-noise
150 mA LDO regulators. The MIC5376 and MIC5378
include an auto-discharge circuit that is switched on
when the regulator is disabled through the enable pin.
The MIC5376/7/8 regulators are protected from
damage due to fault conditions, offering linear current
limiting and thermal shutdown.
4.1
Input Capacitor
The MIC5376/7/8 are high-performance, high
bandwidth devices. An input capacitor of 1 µF is
required from the input to ground to provide stability.
Low-ESR ceramic capacitors provide optimal
performance at a minimum of space. Additional
high-frequency capacitors, such as small-valued NPO
dielectric-type capacitors, help filter out high-frequency
noise and are good practice in any RF-based circuit.
X5R or X7R dielectrics are recommended for the input
capacitor. Y5V dielectrics lose most of their
capacitance over temperature and are, therefore, not
recommended.
4.2
Enable/Shutdown
The MIC5376/7/8 is provided with an active-high
enable pin that allows the regulator to be disabled.
Forcing the enable pin low disables the regulator and
sends it into a “zero” off-mode-current state. In this
state, current consumed by the regulator goes nearly to
zero. Forcing the enable pin high enables the output
voltage. The active-high enable pin uses CMOS
technology and the enable pin cannot be left floating; a
floating enable pin may cause an indeterminate state
on the output.
4.5
Adjustable Regulator Design
The MIC5377/8 adjustable version allows setting the
output voltage down to 1V with the use of two external
feedback resistors.
J1
VIN
J5
EN
U1 MIC5377/8-xxYMT
2
VIN
VOUT 3
C1
2.2μF
6.3V
X7R/X5R dielectric-type ceramic capacitors are
recommended because of their temperature
performance. X7R-type capacitors change capacitance
by 15% over their operating temperature range and are
the most stable type of ceramic capacitors. Z5U and
Y5V dielectric capacitors change value by as much as
50% and 60%, respectively, over their operating
temperature ranges. To use a ceramic chip capacitor
with Y5V dielectric, the value must be much higher than
an X7R ceramic capacitor to ensure the same
minimum capacitance over the equivalent operating
temperature range.
No-Load Stability
Unlike many other voltage regulators, the MIC5376/7/8
will remain stable and in regulation with no load. This is
especially important in CMOS RAM keep-alive
applications.
DS20006080B-page 10
1
EN
ADJ
C2
2.2μF
6.3V
7
GND
(
VOUT = VREF 1+
FIGURE 4-1:
Resistors.
4.6
J3
VOUT
R1
619Nȍ
R2
267Nȍ
4,5,6,8
J2
GND
Output Capacitor
For output voltages ≥ 2.5V, the MIC5376/7/8 require a
minimum 1 µF output capacitor. For output voltages
below 2.5V, a 2.2 µF minimum output capacitor is
required. The design is optimized for use with low-ESR
ceramic chip capacitors. High-ESR capacitors are not
recommended because they may cause high
frequency oscillation. The output capacitor can be
increased, but performance does not improve
significantly with larger capacitance.
4.3
4.4
J4
GND
R1
R2
)
Adjustable Regulator with
Thermal Considerations
The MIC5376/7/8 are designed to provide 150 mA of
continuous current in a very small package. Maximum
ambient operating temperature can be calculated
based on the output current and the voltage drop
across the part. For example if the input voltage is 3.6V,
the output voltage is 2.8V, and the output current is
150 mA, the actual power dissipation of the regulator
circuit can be determined using the following equation:
EQUATION 4-1:
P D = V IN – V OUT I OUT + V IN I GND
Because these devices are CMOS and the ground
current is typically
