MICREL MIC94300

MIC94300
200mA Switch
with Ripple Blocker™ Technology
General Description
Features
The MIC94300 is an integrated load switch that
incorporates Micrel’s Ripple Blocker™ active filter
technology. The MIC94300 provides high-frequency ripple
attenuation (switching noise rejection) for applications
where a switching noise cannot be tolerated by sensitive
downstream circuits such as in RF applications. A lowvoltage logic enable pin disconnects the pass element and
places the MIC94300 into a low current-shutdown state
when disabled.
The MIC94300 operates from an input voltage of 1.8V to
3.6V, allowing true load switching of low-voltage power
rails in any electronic device. The output voltage (VOUT) is
set at a fixed drop (typically 170mV) from the input voltage
(VOUT = VIN – 170mV). This maintains high efficiency
independent of given load conditions and currents.
Packaged in a 0.88mm x 0.88mm 4-ball CSP or 4-pin
1.2mm x 1.6mm Thin MLF® package, the MIC94300 has a
junction operating temperature range of −40°C to +125°C.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
• 1.8V to 3.6V input voltage range
• Active noise rejection over a wide frequency band
− >60dB from 40kHz to 5MHz
• Rated to 200mA output current
• Current-limit and thermal-limit protected
• Ultra-small 0.88mm x 0.88mm 4-ball CSP
• 1.2mm x 1.6mm, 4-pin Thin MLF®
• Logic-controlled enable pin
• −40°C to +125°C junction temperature range
Applications
•
•
•
•
•
•
•
Smart phones
Tablet PC/notebooks and webcams
Digital still and video cameras
Videoconferencing
Bar-code scanners
Global positioning systems
Automotive and industrial applications
_________________________________________________________________________________________________
Typical Application
PSRR COUT = 1µF
0
-10
-20
PSRR (dB)
-30
VIN = 3.6V
-40
-50
-60
VIN = 1.8V
-70
VIN = 2.5V
-80
-90
VIN = VIN(NOM) + 40mVpp
LOAD = 100mA
-100
10
100 1.E+03
1K
10K 1.E+05
100K 1.E+06
1M
10M
1.E+01
1.E+02
1.E+04
1.E+07
FREQUENCY (Hz)
Ripple Blocker 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
February 2012
M9999-020312-A
Micrel, Inc.
MIC94300
Ordering Information
Part Number
MIC94300YCS
MIC94300YMT
1,2
Marking Code
Package
Lead Finish
AF
0.88mm × 0.88mm WLCSP
Pb-Free
®
Pb-Free
1.2mm × 1.6mm Thin MLF
43Z
Notes:
®
1.
Thin MLF ▲ = Pin 1 identifier.
2.
Thin MLF is a GREEN RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free.
®
Pin Configuration
Top View
Top View
4-Ball 0.88mm × 0.88mm CSP (CS)
4-Pin 1.2mm × 1.6mm Thin MLF® (MT)
Pin Description
Pin Number
(Thin MLF®)
Ball Number
(CSP)
Pin Name
1
B2
EN
2
B1
GND
3
A1
VOUT
4
A2
VIN
EP
−
ePad
February 2012
Pin Name
Enable input. A logic HIGH signal on this pin enables the part. Logic LOW
disables the output. Do not leave floating.
Ground.
Power switch output.
Power switch input and chip supply.
Exposed Heatsink Pad. Connect to Ground for best thermal performance.
2
M9999-020312-A
Micrel, Inc.
MIC94300
Functional Block Diagram
February 2012
3
M9999-020312-A
Micrel, Inc.
MIC94300
Absolute Maximum Ratings(1)
Operating Ratings(2)
Input Voltage (VIN) ........................................... −0.3V to +4V
Output Voltage (VOUT). .................................... −0.3V to +4V
Enable Voltage (VEN)..................−0.3V to VIN + 0.3V or +4V
Lead Temperature (soldering, 10s)............................ 260°C
Storage Temperature (TS)......................... −65°C to +150°C
ESD Rating(3) .................................................................. 3kV
Input Voltage (VIN)........................................ +1.8V to +3.6V
Enable Voltage (VEN).............................................. 0V to VIN
Junction Temperature (TJ) ........................ –40°C to +125°C
Junction Thermal Resistance
0.88mm x 0.88mm WLCSP (θJA) .....................250°C/W
1.2mm x 1.6mm Thin MLF® (θJA).....................173°C/W
Electrical Characteristics(4)
VIN = VEN = 3.6V; IOUT = 100µA; COUT = 1µF; TA = 25°C, bold values indicate –40°C ≤ TJ ≤ +125°C, unless noted.
Parameter
Condition
Min.
Typ.
1.8
Input Voltage
Voltage Drop
VIN − VOUT, −40°C ≤ TJ ≤ +85°C
170
VIN Ripple Rejection
f = 20kHz, IOUT = 100mA
45
(PSRR)
f = 100kHz to 5MHz, IOUT = 100mA
60
Total Output Noise
f = 10Hz to 100kHz
98
Current Limit
VOUT = 0V
Turn-On Time
200
Max.
Units
3.6
V
250
mV
dB
µVRMS
315
400
mA
EN controlled
40
150
µs
Load Regulation
100µA to 100mA
10
Ground Current
IOUT = 100µA
138
Shutdown Current
VEN = 0V
0.2
mV
200
µA
µA
Enable
0.4
Input Logic LOW
1.0
Input Logic HIGH
Input Current
V
V
0.01
1
µA
Notes:
1.
Exceeding the absolute maximum rating may damage the device.
2.
The device is not guaranteed to function outside its operating rating.
3.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5kΩ in series with 100pF.
4.
Specification for packaged product only.
February 2012
4
M9999-020312-A
Micrel, Inc.
MIC94300
Typical Characteristics
PSRR COUT = 0.47µF
-10
-20
IOUT = 200mA
-50
-60
-70
-20
IOUT = 10mA
-50
-60
-90
VIN = 3.6V+40mVpp
-60
-80
VIN = VIN(NOM) + 40mVpp
LOAD = 100mA
-90
0
-10
-20
-20
-30
VIN = 3.6V + 40mVpp
PSRR COUT = 2.2µF
0
-10
VIN = 3.6V
-50
VIN = 1.8V
PSRR (dB)
-20
-40
-30
-40
IOUT = 200mA
IOUT = 100mA
-50
-60
-70
-70
VIN = VIN(NOM) + 40mVpp
LOAD = 100mA
-90
-100
10
100 1.E+03
1K
10K 1.E+05
100K 1.E+06
1M
10M
1.E+01
1.E+02
1.E+04
1.E+07
-40
-60
-90
VIN = 3.6V + 40mVpp
FREQUENCY (Hz)
PSRR COUT = 4.7µF
PSRR COUT = 10µF
0
0
-10
-10
-10
-20
-20
-20
-30
-30
IOUT = 200mA
-50
-60
-70
-40
-50
-60
-70
IOUT = 10mA
-80
VIN = 3.6V+40mVpp
-100
10
100 1.E+03
1K
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
1.E+01
1.E+02
1.E+04
FREQUENCY (Hz)
February 2012
-80
-90
IOUT = 100mA
-30
V IN = 1.8V
VIN = 2.5V
VIN = 3.6V
VIN = VIN + 40mVpp
LOAD = 100mA
PSRR (dB)
-40
PSRR (dB)
0
IOUT = 100mA
VIN = 2.5V
VIN = VIN(NOM) + 40mVpp
LOAD = 100mA
-100
10
100 1.E+03
1K
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
1.E+01
1.E+02
1.E+04
FREQUENCY (Hz)
PSRR COUT = 4.7µF
VIN = 1.8V
-80
-100
10
100 1.E+03
1K
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
1.E+01
1.E+02
1.E+04
FREQUENCY (Hz)
VIN = 3.6V
-50
-70
IOUT = 10mA
-80
VIN = 2.5V
-80
-90
IOUT = 10mA
FREQUENCY (Hz)
PSRR COUT = 2.2µF
-10
IOUT = 200mA
IOUT = 100mA
-100
10
100 1.E+03
1K
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
1.E+01
1.E+02
1.E+04
0
-30
PSRR (dB)
-50
FREQUENCY (Hz)
PSRR COUT = 1µF
PSRR (dB)
-40
-70
VIN = 2.5V
-100
10
100 1.E+03
1K
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
1.E+01
1.E+02
1.E+04
FREQUENCY (Hz)
-90
VIN = 1.8V
-80
-100
10
100 1.E+03
1K
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
1.E+01
1.E+02
1.E+04
-60
-30
VIN = 3.6V
-40
-70
-80
-90
-20
PSRR (dB)
IOUT = 100mA
0
-10
PSRR (dB)
-40
0
-10
-30
PSRR (dB)
PSRR (dB)
-30
PSRR COUT = 1µF
PSRR COUT = 0.47µF
0
-50
-60
-70
FREQUENCY (Hz)
5
IOUT = 10mA
-80
-90
-100
10
100 1.E+03
1K
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
1.E+01
1.E+02
1.E+04
IOUT = 200mA
-40
VIN = 3.6V + 40mVpp
-100
10
100 1.E+03
1K
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
1.E+01
1.E+02
1.E+04
FREQUENCY (Hz)
M9999-020312-A
Micrel, Inc.
MIC94300
Typical Characteristics (Continued)
0
0
0
-10
-10
-10
-20
-20
-30
-30
-40
-50
-60
VIN = 1.8V
-40
-50
-60
FREQUENCY (Hz)
Voltage Drop vs.
Output Current
1.90
1.85
1.80
1.75
1.70
VIN = 2.0V
3.60
195
3.55
190
VOLTAGE DROP (mV)
OUTPUT VOLTAGE (V)
3.50
3.45
3.40
3.35
VIN = 3.6V
1.60
80 100 120 140 160 180 200
0
20
40
60
80 100 120 140 160 180 200
0
Ground Current
vs. Output Current
GROUND CURRENT (μA)
190
IOUT = 200mA
185
IOUT = 100mA
175
IOUT = 50mA
CIN = COUT = 1µF
2
2.2
2.4
2.6
2.8
3
3.2
INPUT VOLTAGE (V)
February 2012
3.4
145
140
135
130
125
120
VIN = 3.6V
115
CIN = COUT = 1μF
165
1.8
25
3.6
110
0
20
40
60
80
100 120 140 160 180 200
OUTPUT CURRENT (mA)
6
50
75
100
125
150
175
200
OUTPUT CURRENT (mA)
150
170
170
OUTPUT CURRENT (mA)
Voltage Drop vs.
Input Voltage
180
175
165
OUTPUT CURRENT (mA)
195
180
CIN = COUT = 1µF
3.30
60
185
CIN = COUT = 1µF
CIN = COUT = 1µF
GROUND CURRENT (μA)
OUTPUT VOLTAGE (V)
-90
Output Voltage
vs. Output Current
1.95
40
COUT = 4.7µF
VIN = 3.6V + 40mVpp
LOAD = 100mA
FREQUENCY (Hz)
2.00
20
-60
-100
10
100 1.E+03
1K
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
1.E+01
1.E+02
1.E+04
-100
10
100 1.E+03
1K
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
1.E+01
1.E+02
1.E+04
Output Voltage
vs. Output Current
0
-50
-80
VIN = 3.6V + 40mVpp
LOAD = 100mA
FREQUENCY (Hz)
1.65
COUT = 10µF
-40
-70
-90
-100
10
100 1.E+03
1K
10K 1.E+05
100K 1.E+06
1M 1.E+07
10M
1.E+01
1.E+02
1.E+04
COUT = 2.2µF
-30
COUT = 2.2µF
-80
VIN = VIN(NOM) + 40mVpp
LOAD = 100mA
-90
COUT = 1µF
-70
VIN = 2.5V
-80
-20
COUT = 0.47µF
PSRR (dB)
VIN = 3.6V
-70
VOLTAGE DROP (mV)
PSRR (Varying COUT)
PSRR (Varying COUT)
PSRR (dB)
PSRR (dB)
PSRR COUT = 10µF
Ground Current
vs. Input Voltage
141
140
139
138
137
136
135
134
133
132
131
130
129
128
127
126
125
IOUT = 100mA
IOUT = 200mA
IOUT = 10mA
CIN = COUT = 1μF
1.8
2
2.2
2.4
2.6
2.8
3
3.2
3.4
3.6
INPUT VOLTAGE (V)
M9999-020312-A
Micrel, Inc.
MIC94300
Typical Characteristics (Continued)
Output Noise
Spectral Density
Current Limit
vs. Input Voltage
400
10
350
Noise µV/√Hz
CURRENT LIMIT (mA)
375
325
300
275
250
1
0.1
VIN = VEN = 2.91V
CIN = COUT = 1.0µF
225
CIN = COUT = 1μF
NOISE (10Hz to 100kHz) = 98.5µVRMS
200
1.8
2
2.2
2.4
2.6
2.8
3
3.2
INPUT VOLTAGE (V)
February 2012
3.4
3.6
0.01
10
1.E+01
100
1.E+02
1K
1.E+03
10K
1.E+04
100K
1.E+05
1M
1.E+06
FREQUENCY (Hz)
7
M9999-020312-A
Micrel, Inc.
MIC94300
Functional Characteristics
February 2012
8
M9999-020312-A
Micrel, Inc.
MIC94300
Application Information
Enable/Shutdown
The MIC94300 comes with an active-high enable pin
that allows the Ripple Blocker™ to be disabled. Forcing
the enable pin low disables the MIC94300 and sends it
into a “zero” off mode current state. In this state, current
consumed by the MIC94300 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.
The MIC94300 utilizes Ripple Blocker™ technology to
integrate a load switch with a high-performance active
filter. The MIC94300 includes a low-voltage logic enable
pin, and is fully protected from damage due to fault
conditions, offering linear current limiting and thermal
shutdown.
Input Capacitor
The MIC94300 is a high-performance, high-bandwidth
device. An input capacitor of 470nF 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.
Thermal Considerations
The MIC94300 is designed to provide 200mA 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 which is fixed at 170mV typical, 250mV worst case.
For example if the input voltage is 2.75V, the output
voltage is 2.5V, and the output current = 200mA. The
actual power dissipation of the Ripple Blocker™ can be
determined using the equation:
Output Capacitor
The MIC94300 requires an output capacitor of 0.47µF or
greater to maintain stability. For optimal ripple rejection
performance a 1µF capacitor is recommended. 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 has
been optimized for a 1µF ceramic output capacitor and
does not improve significantly with larger capacitance.
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.
PD = (VIN − VOUT1) IOUT + VIN IGND
Because this device is CMOS and the ground current is
typically <100µA over the load range, the power
dissipation contributed by the ground current is <1% and
can be ignored for this calculation:
PD = (2.75V − 2.5V) × 200mA
PD = 0.05W
To determine the maximum ambient operating
temperature of the package, use the junction-to-ambient
thermal resistance of the device and the following basic
equation:
⎛ TJ(MAX) − TA
PD(MAX) = ⎜⎜
θ JA
⎝
No Load Stability
The MIC94300 will remain stable with no load. This is
especially important in CMOS RAM keep-alive
applications.
February 2012
⎞
⎟
⎟
⎠
TJ(max) = 125°C, the maximum junction temperature of the
die, θJA thermal resistance = 250°C/W for the YCS
package and 173°C/W for the YMT package.
9
M9999-020312-A
Micrel, Inc.
MIC94300
Substituting PD for PD(max) and solving for the ambient
operating temperature will give the maximum operating
conditions for the regulator circuit.
The maximum power dissipation must not be exceeded
for proper operation.
For example, when operating the MIC94300YMT at an
input voltage of 2.75V and 200mA load with a minimum
footprint layout, the maximum ambient operating
temperature TA can be determined as follows:
0.05W = (125°C − TA)/(173°C/W)
TA = 116°C
Therefore the maximum ambient operating temperature
of 116°C is allowed in a 1.2mm x 1.6mm MLF® package.
For a full discussion of heat sinking and thermal effects
on voltage regulators, refer to the “Regulator Thermals”
section of Micrel’s Designing with Low-Dropout Voltage
Regulators handbook. This information can be found on
Micrel's website at:
http://www.micrel.com/_PDF/other/LDOBk_ds.pdf
For more information about Micrel’s Ripple Blocker™
products, go to:
http://www.micrel.com/rippleblocker/
http://www.micrel.com/page.do?page=/productinfo/products/mic94300.jsp
http://www.micrel.com/page.do?page=/productinfo/products/mic94310.jsp
February 2012
10
M9999-020312-A
Micrel, Inc.
MIC94300
Evaluation Board Schematic
Bill of Materials
Item
Part Number
C1, C2
GRM155R61A105KE15D
U1
MIC94300YCS
Manufacturer
Murata(1)
Micrel, Inc.
(2)
Description
Qty.
Capacitor, 1µF Ceramic, 10V, X7R, Size 0402
2
200mA Ripple Blocker™ Voltage Follower
1
Notes:
1. Murata Tel: www.murata.com.
2. Micrel, Inc.: www.micrel.com.
February 2012
11
M9999-020312-A
Micrel, Inc.
MIC94300
Package Information1
4-Ball 0.88mm × 0.88mm WL-CSP (CS)
Note:
1.
Package information is correct as of the publication date. For updates and most current information, go to www.micrel.com.
February 2012
12
M9999-020312-A
Micrel, Inc.
MIC94300
Package Information1 (Continued)
4-Pin 1.2mm × 1.6mm Thin MLF® (MT)
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This
information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry,
specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual
property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no liability
whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or warranties
relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant
into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A
Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully
indemnify Micrel for any damages resulting from such use or sale.
© 2012 Micrel, Incorporated.
February 2012
13
M9999-020312-A