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MIC94305
500mA Switch
with Ripple Blocker Technology
Ripple Blocker is a trademark of Micrel, 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
September 2012 M9999-091312-A
ns. A low-el
tronic device. The outp
s maintains hig
ckaged in a 6-ball 0.84mm x 1.32mmCSP package, or 6-pin 1.6mm x 1.6mm Thin DFNpackage, and has a junction operating temperature range
of40C to +125C.
Data sheets and support documentation can be found on
Micrels web site at: www.micrel.com
General Description
The MIC94305 is an integrated loadincorporates Micrels Ripple Blocker atechnology. The MIC94305 provides high-freq
switch thatctive filteruency ripple
attenuation (switching noise rejection) forwhere switching noise cannot be tolerated bdownstream circuits, such as RF applicatiovoltage logic enable pin disconnects the passputs the MIC94305 in a low current-shutdowndisabled.
applicationsy sensitive
ement andstate when
The MIC94305 operates from an input voltage3.6V, allowing true load switching of low-vorails in any elec
of 1.8V toltage power
ut voltage (VOUT) isset at a fixed drop (typically 170mV) from the i(V = V 170mV). Thi
nput voltage
OUT IN
independent of given load conditions and currents.h efficiency
The MIC94305 is pa
Features
.
voltage range
n over a wide frequency band
40kHz to 5MHz
t current
Current-limit and thermal-limit protected
Ultra-small 0.84mm x 1.32mm, 6-ball CSP
1.6mm x 1.6mm, 6-pin Thin DFNd enable pin
C junction temperature range
tions
Tablet PC/notebooks and webcams
Digital still and video cameras
Videoconferencing
Bar-code scanners
Global positioning systems
Automotive and industrial applications
_________________________________________________________________________________________________
Typical Application
1.8V to 3.6V input
Active noise rejectio >60dB from
Rated to 500mA outpu
Logic-controlle
40C to +125
Applica
Smart phones
PSRR COUT = 4.7F
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1,000 10,000 100,00
0
1,000,0
00
10,000,
000
FREQUENCY (Hz)
PSRR(dB)
VIN = 2.5V + 40mVpp 10mA
300mA
10 100 1K 10K 100K 1M 10M
500mA
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Micrel, Inc. MIC94305
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g Informati
er Marking Cod Package Lead Finish
Orderin on
Part Numb e
MIC94305YCS* W1 0.84mm 1.32mm WLCSP Pb-Free
MIC94305YMT1
2W 1.6mm 1.6mm Thin DFN Pb-Free
Notes:
1. Thin DFN is a GREEN RoHS-compliant package. Lead finish is NiPdAu. Mold compound is Halogen Free. availability.
Pin Configur
Contact Micrel Marketing for
ation
6-Ball 0.84mm 1.32mm CSP (CS)Ba
6-Pin 1.6mm 1.6mm Thin DFN (MT)Top View
Note
1. Thin DFN = identifier.
Pin Description
Pin Number(Thin DFN)
Ball Number(CSP)
Pin Name Pin Name
ll View
:
Pin 1
1, 2 A2, B2 VOUT Power switch output.
3 C2 GND Ground.
4 C1 ENEnable input. A logic HIGH signal on this pin enables the part. Logic LOWdisables the output. Do not leave floating.
5, 6 A1, B1 VIN Power switch input and chip supply.
EP ePad Exposed heatsink pad. Connect to Ground for best thermal performance.
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Functional Block Diagram
MIC94305 Block Diagram
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Micrel, Inc. MIC94305
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0
0
0 Vmperature (sol
Storage Temperature (TS).........................65C to +150C
ESD Rating(3)
..................................................................3kV
................+1.8V to +3.6Vge (V 0V to VIN
.............40C to +125C
0.84mm x 1.32mm WLCSP (JA).....................160C/W
1.6mm x 1.6mm Thin DFN (JA) ........................92C/W
al Characteristics(4)
VIN = VEN = 3.6V; IOUT = 1mA; bold values indicate 40C J + C, unless noted.
Min. Typ. Max. Units
Absolute Maximum Ratings(1)
Input Voltage (VIN) ........................................... .3V to +4V Input Voltage (VIN)........................
Output Voltage (VOUT). .................................... . to 4V lta EN)...............................................
3V + Enable Vo
Enable Voltage (VEN)..................0.3V to VIN+Lead Te dering, 10s)............................
.3 or +4V260C
Junction Temperature (TJ) ..........Junction Thermal Resistance
Operating Ratings(2)
Electric
COUT = 4.7F; TA = 25C, T 125
Parameter Condition
Input Voltage 1.8 3.6 V
Voltage Drop VIN VOUT, 40C TJ+85C 170 250 mV
f = 20kHz, IOUT = 500mA 45VIN Ripple Rejection (PSRR
100kHz to 5MHz, IOUT = 500mA 55
dB)
f =
Total Output Noise f = 10Hz to 100kHz 98 VRMS
Current Limit VOUT = 0V 530 725 1100 mA
Turn-On Time EN controlled 90 150 s
Load Regulation 100A to 100mA 10 mV
Ground Current I = 100A 150 200 AOUT
Shutdown Current VEN = 0V 0.2 5 A
Enable
Input Logic LOW 0.4 V
Input Logic HIGH 1.0 V
Input Current 0.01 1 A
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 are recommended. Human body model, 1.5k in series with 100pF.
4. Specification for packaged product only.
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Typical Characteristics
PS
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1,000
FR
PSRR(dB)
RR COUT = 22F
10,000 100,00
0
1,000,0
00
10,000,
000
EQUENCY (Hz)
VIN = 2.5V + 40mVpp
300mA
10mA
500mA
K 10K 100K 1M 10M10 100 1
PSRR C
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1,000
FREQ
PSRR(dB)
OUT = 22F
10,000 100,00
0
1,000,0
00
10,000,
000
UENCY (Hz)
VIN = 1.8V + 40mV
10 100 1K
pp
10K 100K 1M 10M
300mA
10mA
PSRR C
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1,000
FR
PSRR(dB)
OUT = 22F
10,000 100,00
0
1,000,0
00
10,000,
000
EQUENCY (Hz)
VIN = 3.6V + 40m
10 100 1K
Vpp
10K 100K 1M 10M
500mA
10mA
300mA
PSRR C
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1,000
FRE
PSRR(dB)
OUT = 10F
10,000 100,00
0
1,000,0
00
10,000,
000
QUENCY (Hz)
VIN = 1.8V + 40mV
10 100 1k
pp
10k 100k 1M 10M
500mA
300mA
10mA
PSRR C
-80
-70
-60
-5
-40
-30
-20
-10
0
10 100 1,000 10,000 100,00
0
1,000,0
00
10,000,
000
FREQUENCY (Hz)
PSRR(dB)
OUT = 10F
0
VIN = 2.5V + 40mVpp
300mA
10 100 1k 10k 100k 1M 10M
10mA
500mA
PSRR C
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1,000
FRE
PSRR(dB)
OUT = 10F
10,000 100,00
0
1,000,0
00
10,000,
000
QUENCY (Hz)
VIN = 3.6V + 40m
10 100 1k
Vpp
10k 100k 1M 10M
500mA
10mA
300mA
PSRR C
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 000 10,000 100,00
0
1,000,0
00
10,000,
000
FREQUENCY (Hz)
PSRR(dB)
OUT = 4.7F
1,
VIN = 1.8V + 40mVpp
10 100 1K 10K 100K 1M 10M
500mA
300mA
10mA
PSRR COUT = 4.7F
-8
-70
-60
-50
-40
-30
-20
-10
0
10 100 1,000 10,000 100,00
0
1,000,0
00
10,000,
000
FREQUENCY (Hz)
PSRR(dB)
0
VIN = 2.5V + 40mVpp 10mA
300mA
10 100 1K 10K 100K 1M 10M
500mA
PSRR C
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1,000
FRE
PSRR(dB)
OUT = 4.7F
10,000 100,00
0
1,000,0
00
10,000,
000
QUENCY (Hz)
VIN = 3.6V + 40mVpp
500mA
10mA
300mA
10K 100K 1M 10M10 100 1K
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Typical Characteristics (Continued)
Output Voltage
vs. Output Current
1.45
1.5
1.55
1.6
1.65
1.7
1.75
1.8
OUTPUTVOLTAGE
(V)
Output Voltage
vs. Output Current
3.35
3.4
3.45
3.5
3.55
3.6
Voltage Drop
vs. Output Current
20
40
60
80
100
120
140
160
180
200
220
240
260
VOLTAGEDROP(m
V)
3.3
0 50 100 150 200 250 300 350 400 450 500
OUTPUTVOLTAGE
(V)
OUTPUT CURRENT (mA)
1.4
0 50 100 150 200 250 300 350 400 450 500
OUTPUT CURRENT (mA)
VIN = 1.8V
CIN = COUT = 4.7FVIN = 3.6V
CIN = COUT = 4.7F
0
0 50 100 150 200 250 300 350 400 450 500
OUTPUT CURRENT (mA)
CIN = COUT = 4.7F
V = 2VIN
Ground Current
vs. Output Current
20
40
60
0
100
120
140
160
0 50 100 150 200 250 300 350 400 450 500
OUTPUT CURRENT (mA)
GROUNDCURRENT(A)
80
VIN = 2.8V
CIN = COUT = 4.7F
Voltage Drop
vs. Input Voltage
160
170
180
190
200
210
220
230
240
250
1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6
INPUT VOLTAGE (V)
VOLTAGEDROP(mV)
MIC94305YMT
Output Noise Spectral Density
0.001
0.01
0.1
1
10
100
NOISEV/Hz
10 100 1,000 10,000 100,00
0
1,000,0
00
10,000,
000
FREQUENCY (Hz)
VIN = VEN1 = 3V
COUT = 4.7F
10 100 1K 10K 100K 1M 10M
1
Ground C
vs. Inp
120
130
140
150
160
170
180
1.8 2 2.2 2.4
INPU
GROUNDCURRENT(A)
urrent
ut Voltage
2.6 2.8 3 3.2 3.4 3.6
T VOLTAGE (V)
CIN = COUT = 4.7F
500mA
CIN = COUT = 4.7F
400mA
500mA
300mA
100mA
300mA
10mA
100mA 50mA
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Functional Characteristics
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hnolanceogic
s fully protected from damage caused bffering linear current limiting and t
-banhe in
R cus
capl-valued NPO dielectric-type capt high-frequency noise and are
die tricsdiel ctrics
ure and
of 4 F or ection
ded. Theeram -chipommillatio
anpacitor andcitance.
because of their temp aturecapacitors change capa
aZ5
ctric capacitors change value by as much as50% and 60%, respectively, over their operatingtemperature ranges. If you use a ceramic-chip capacitorwith a Y5V dielectric, the value must be much higherthan an X7R ceramic capacitor to ensure the sameminimum capacitance over the equivalent operatingtemperature range.
No Load Stability
The MIC94305 will remain stable with no load. This is
especially important in CMOS RAM keep-aliveapplications.
active-high enable pinbe disabled. Forcing the94305 and sends it into
currennearly zero. Forcing
high enables the output voltage. Thehigh enable pin uses CMOS technology andenable pin may cause
tput.
to provide 500mA omall package. Maximumcan be calculated based
put current and the voltage drop across themV typical, 250mV worst case
he input voltage is 2.75V, the outpurrent is 500mA. The
ipple Blocker can be
VOUT) IOUT+ VIN IGND
Because this device is CMOS and the ground current isoad range, the powe
und current is
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Micrel, Inc. MIC94305
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ientop rating
the regulator circuit.
ma imum
MIC94305YMT at a
2.75V input voltage and 500mA load with a mi imumfootp m ambient op ratingtemp an be determined as follows:
m a bientowed in a 1.6mmiscussion of heat
regulators, referto the Regulator Thermals section of Micrels De gning
boo Thiscan be found on Micrel's website at:
/other/LDOBk_ds.pdf
Substituting PD for PD(MAX) and solving for the amboperating temperature gives the maximumconditions for
e
For proper operation, do not exceed thepower dissipation.
For example, when operating the
x
nrint layout, the maximu eerature TA c
0.125W = (125C TA)/(92 C/W)
TA = 113.5C
It follows from this equation that the maximuoperating temperature of 113.5C is all
m
x 1.6mm DFN package. For a full dsinking and thermal effects on voltage
si
with Low-Dropout Voltage Regulators handinformation
k.
http://www.micrel.com/_PDF
ls Ripple Blocker
/rippleblocker/
For more information about Micreproducts, go to:
http://www.micrel.com
http://www.micrel.com/page.do?page=/product-info/products/mic94300.jsp
http://www.micrel.com/page.do?page=/product-info/products/mic94310.jsp
http://corpmail.micrel.com/exchweb/bin/redir.asp?URL=http://www.micrel.com/rippleblocker/http://corpmail.micrel.com/exchweb/bin/redir.asp?URL=http://www.micrel.com/page.do?page=/product-info/products/mic94310.jsphttp://corpmail.micrel.com/exchweb/bin/redir.asp?URL=http://www.micrel.com/page.do?page=/product-info/products/mic94310.jsphttp://corpmail.micrel.com/exchweb/bin/redir.asp?URL=http://www.micrel.com/rippleblocker/7/30/2019 MIC94305 - 500mA Switch with Ripple Blocker
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Micrel, Inc. MIC94305
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Ty
pical Application Schematic
Part Number Manufacturer Description Qty.
Bill of Materials
Item75K TDK
(1)Capacitor, 4.7F Ceramic, 10V, X7R, Size 0603 2CIN, COUT C1005X5R1A4
U1 MIC94305YCS Micrel, Inc.(2)
500mA Switch with Ripple Blocker Technology 1
Notes:
1. TDK: www.tdk.com.
2. Micrel, Inc.: www.micrel.com.
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Package Information(1)
6-Ball 0.84mm 1.32mm 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.
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Package Information(1) (Continued)
6-Pin 1.6mm 1.6mm Thin DFN (MT)
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MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USATEL +1 (408) 9 4-1000 WEB http://www.micrel.com44-0800 FAX +1 (408) 47
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. Thisinformation 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 intellectualproperty rights is granted by this document. Except as provided in Micrels 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 warrantiesrelating 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 productcan reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implan
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. APurchasers use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchasers own risk and Purchaser agrees to fully
indemnify Micrel for any damages resulting from such use or sale.
2012 Micrel, Incorporated.
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