FAN48618BUC53X [ONSEMI]
2.5 MHz，固定输出，同步 Tiny Boost® 稳压器;
| 型号： | FAN48618BUC53X |
| 厂家： | 
ONSEMI |
| 描述： | 2.5 MHz，固定输出，同步 Tiny Boost® 稳压器 开关 稳压器 |
| 文件： | 总11页 (文件大小：1152K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
DATA SHEET
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2.5 MHz, Fixed-Output,
Synchronous TinyBoost)
Regulator
WLCSP9 1.215x1.215x0.581
CASE 567QW
FAN48618
MARKING DIAGRAM
The FAN48618 is a low−power boost regulator designed to provide
a minimum voltage regulated rail from a standard single−cell Li−Ion
battery and advanced battery chemistries. Even below the minimum
system battery voltage, the device maintains output voltage regulation.
The combination of built−in power transistors, synchronous
rectification, and low supply current suit the FAN48618 for
battery−powered applications.
J9WL
YWA
J9 = Device Code
WL = Wafer Lot Number
YW = Assembly Start Week
The FAN48618 is available in a 9−bump, 0.4 mm pitch,
Wafer−Level Chip−Scale Package (WLCSP).
A
= Assembly Site
Features
• Input Voltage Range: 2.7 V to 4.8 V
• Output Voltage: 5.25 V
ORDERING INFORMATION
See detailed ordering and shipping information on page 10 of
this data sheet.
• Internal Synchronous Rectification
• True Load Disconnect
• Short−Circuit Protection
• 9−Bump, 1.215 mm x 1.215 mm, 0.4 mm Pitch, WLCSP
• Three External Components: 2012 0.47 mH Inductor, 0402 4.7 mF
Input Capacitor, 0603 22 mF Output Capacitor
Applications
• Class−D Audio Amplifier and USB OTG Supply
• Boost for Low−Voltage Li−Ion Batteries
• Smart Phones, Tablets, Portable Devices, and Wearables
VIN
VOUT
+
Battery
C
IN
4.7 mF
C
22 mF
OUT
SYSTEM
LOAD
L1
FAN48618
SW
PGND
0.47 mH
EN
AGND
Figure 1. Typical Application
© Semiconductor Components Industries, LLC, 2017
1
Publication Order Number:
September, 2022 − Rev. 2
FAN48618/D
FAN48618
SW
VIN
Q2B
Q2A
L1
VOUT
COUT
Q2
Q1
CIN
Synchronous
Rectifier
Control
PGND
EN
MODULATOR
LOGIC
AGND
AND CONTROL
Figure 2. IC Block Diagram
RECOMMENDED COMPONENTS
Component
Description
Vendor
Parameter
Typ
0.47
37
Unit
mH
L1
2012, 4.0 A, 0.8 mm Max. Height
CIGT201208EMR47SNE SEMCO
L
DCR (Series R)
mW
mF
C
IN
10%, 10 V, X5R, 0402
20%, 10 V, X5R, 0603
CL05A475KP5NRNC SEMCO
CL10A226MP8NUNE SEMCO
C
C
4.7
22
C
OUT
mF
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2
FAN48618
PIN CONFIGURATION
VOUT
SW
VIN
A3
A3
B3
C3
A2
B2
C2
A1
B1
C1
A1
B1
C1
A2
B2
C2
EN
B3
PGND
AGND
C3
Figure 3. Bumps Facing Down
(Top View)
Figure 4. Bumps Facing Up
(Bottom View)
PIN DEFINITIONS
Pin No.
A1, A2
A3
Symbol
VOUT
VIN
Description
Output Voltage. This pin is the output voltage terminal; connect directly to C
.
OUT
Input Voltage. Connect to the Li−Ion battery input power source and the bias supply for the gate drivers.
Switching Node. Connect to inductor.
B1, B2
B3
SW
EN
Enable. When this pin is HIGH, the circuit is enabled. It is recommended to connect and set to a logic voltage
of 1.8 V after UVLO has been satisfied.
C1, C2
C3
PGND
AGND
Power Ground. This is the power return for the IC. C
capacitor should be returned with the shortest path
OUT
possible to these pins.
Analog Ground. This is the signal ground reference for the IC. All voltage levels are measured with respect to
this pin. Connect to PGND at a single point.
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3
FAN48618
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Min
−0.3
−
Max
6.0
6.0
6.0
8.0
Unit
V
V
Voltage on VIN Pin
Voltage on VOUT Pin
Voltage on SW Node
IN
V
OUT
V
V
SW
DC
−0.3
−1.0
−0.3
V
Transient: 10 ns, 3 MHz
V
CC
Voltage on Other Pins
6.0
(Note 1)
V
ESD
Electrostatic Discharge Protection Level
Human Body Model,
2
1
kV
ANSI/ESDA/JEDEC JS−001−2012
Charged Device Model per JESD22−C101
T
Junction Temperature
−40
−65
−
+150
+150
+260
°C
°C
°C
J
T
Storage Temperature
STG
T
L
Lead Soldering Temperature (10 Seconds)
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
1. Lesser of 6.0 V or V + 0.3 V.
IN
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
Min
2.7
−
Max
4.8
Unit
V
V
IN
Supply Voltage
I
Output Current (Note 2)
Ambient Temperature
Junction Temperature
1200
+85
mA
°C
OUT
T
A
−40
−40
T
J
+125
°C
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses beyond
the Recommended Operating Ranges limits may affect device reliability.
2. Typical 1 A and 1.2 A I
at V = 2.7 V and 3.0 V, respectively.
OUT
IN
THERMAL PROPERTIES
Symbol
Parameter
Typ
Unit
q
Junction−to−Ambient Thermal Resistance
50
°C/W
JA
Junction−to−ambient thermal resistance is a function of application and board layout. This data is measured with four−layer 2s2p boards in
accordance to JEDEC standard JESD51. Special attention must be paid not to exceed junction temperature T at a given ambient
J(max)
temperature T .
A
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4
FAN48618
ELECTRICAL SPECIFICATIONS (Recommended operating conditions, unless otherwise noted, circuit per Figure 1, V
= 5.25 V,
OUT
V
= 2.7 V to 4.8 V, and T = −40°C to 85°C. Typical values are given V = 3.6 V and T = 25°C.)
IN
A
IN
A
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
POWER SUPPLY
Quiescent Current
I
Q
V
IN
V
= 3.6 V, I
= 0, EN = V
IN
−
−
90
140
10
mA
IN
OUT
Shutdown: EN = 0, V = 3.7 V,
2.7
IN
V
OUT
= 0 V
V
Under−Voltage Lockout
V Rising
IN
−
−
2.2
2.3
V
UVLO
V
Under−Voltage Lockout Hysteresis
150
−
mV
UVLO_HYS
INPUTS
V
Enable HIGH Voltage
1.2
−
−
−
0.4
−
V
V
IH
V
Enable LOW Voltage
−
IL
I
Current Sink Pull−Down
Low−State Active Pull−Down
EN Pin, Logic HIGH
EN Pin, Logic LOW
−
100
300
nA
kW
PD
R
200
400
LOW
OUTPUTS
V
Output Voltage Accuracy DC (Note 3)
Referred to V
, V = 3.0 to 4.5 V
−2
−
−
−
4
1
%
mA
mA
mV
REG
OUT IN
I
V
V
−to−V
Leakage Current
V
OUT
V
OUT
= 0, EN = 0, V = 2.7 V
IN
LK_OUT
IN
OUT
I
−to−V Reverse Leakage Current
OUT
= 5.25 V, EN = 0, V = 2.7 V
−
−
3.5
−
LK
IN
IN
V
Output Ripple (Note 4)
Switching Frequency
0 mA to 1 A
−
25
RIPPLE
TIMING
f
V
LOAD
= 3.6 V, V
OUT
= 5.25 V,
= 5.25 V,
2.0
2.5
3.0
MHz
SW
IN
I
= 500 mA
t
Soft−Start EN HIGH to Regulation
(Note 4)
V
LOAD
= 3.0 V, V
OUT
−
1000
−
ms
SS
IN
I
= 0 mA, C
= 22 mF (0603)
OUT
I
Input Peak Current
−
−
90
20
200
mA
ms
SS
t
FAULT Restart Timer (Note 4)
−
RST
POWER STAGE
R
N−Channel Boost Switch R
V
V
V
V
= 3.6 V, V
= 3.6 V, V
= 5.25 V
= 5.25 V
−
−
−
−
−
−
80
65
130
115
−
mW
mW
A
DS(ON)N
DS(ON)P
DS(ON)
IN
OUT
R
P−Channel Sync. Rectifier R
DS(ON)
IN
OUT
I
Boost Valley Current Limit
= 5.25 V
2.3
1.3
150
20
V_LIM
OUT
I
Boost Soft−Start Valley Current Limit
Over−Temperature Protection (OTP)
OTP Hysteresis
< V
< V
−
A
V_LIM_SS
IN
OUT
OUT_TARGET
T
150T
−
°C
°C
T
150H
−
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product
performance may not be indicated by the Electrical Characteristics if operated under different conditions.
3. DC I
from 0 to 1 A. V
measured from mid−point of output voltage ripple. Effective capacitance of C
≥ 5 mF.
LOAD
OUT
OUT
4. Guaranteed by design and characterization; not tested in production.
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5
FAN48618
TYPICAL CHARACTERISTICS
(Unless otherwise specified, V = 3.6 V, V
= 5.25 V, T = 25°C, and circuit and components according to Figure 1.)
IN
OUT
A
Figure 5. Quiescent Current vs. Input Voltage and
Temperature
Figure 6. Shutdown Current vs. Load Current and
Temperature
Figure 7. Efficiency vs. Load Current and Input
Voltage
Figure 8. Efficiency vs. Load Current and
Temperature
Figure 9. Output Regulation vs. Load Current
and Input Voltage
Figure 10. Output Regulation vs. Load Current and
Temperature
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6
FAN48618
TYPICAL CHARACTERISTICS (continued)
(Unless otherwise specified, V = 3.6 V, V
= 5.25 V, T = 25°C, and circuit and components according to Figure 1.)
IN
OUT
A
Figure 11. Output Ripple vs. Load Current and
Input Voltage
Figure 12. Switching Frequency vs. Load Current
and Temperature
Figure 13. Startup, No Load
Figure 14. Overload Protection
Figure 15. Load Transient, 3.8 VIN, 0 e 500 mA, 8 ms Edge
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7
FAN48618
FUNCTIONAL DESCRIPTION
Overview
Boost Mode Regulation
FAN48618 is a synchronous boost regulator, typically
operating at 2.5 MHz in Continuous Conduction Mode
(CCM), which occurs at moderate to heavy load current and
The current−mode modulator achieves excellent transient
response and smooth transitions between CCM and DCM
operation. During CCM operation, the device maintains a
switching frequency of about 2.5 MHz. In light−load
operation (DCM), frequency is naturally reduced to
maintain high efficiency.
low V voltage. Typically, 1 A and 1.2 A output currents
IN
can be obtained at input voltages ≥ 2.7 V and ≥ 3.0 V,
respectively. Passive component derating must be taken into
consideration, as well as, thermal properties of the regulator.
Startup and Shutdown
When EN is LOW, all bias circuits are off and the regulator
enters Shutdown Mode. During shutdown, current flow
Table 1. OPERATING MODES
Mode
LIN
Description
Linear Startup
Boost Soft−Start
Boost Mode
Invoked When:
is prevented from V to V
, as well as reverse flow
OUT
IN
from V
to V . It is recommended to keep load current
V
IN
> V
OUT
OUT
IN
draw below 50 mA until the device successfully executes
startup. The following table describes the startup sequence.
SS
V
< V
< V
IN
OUT OUT(TARGET)
BST
V
= V
OUT OUT(TARGET)
Table 2. BOOST STARTUP SEQUENCE
Start Mode
Entry
, EN = 1
Exit
End Mode
SS
Timeout (ms)
LIN1
V
IN
> V
V
V
> V − 300 mV
UVLO
OUT
OUT
OUT
IN
TIMEOUT
LIN2
512
1024
64
LIN2
SS
LIN1 Exit
> V − 300 mV
SS
IN
TIMEOUT
FAULT
BST
LIN1 or LIN2 Exit
V
= V
OUT(TARGET)
OVERLOAD TIMEOUT
FAULT
Linear Startup (LIN) Mode
Boost (BST) Mode
When EN is HIGH and V > V
, the regulator
This is the normal operating mode of the regulator.
IN
UVLO
attempts to bring V
internal fixed current source from V (Q2). The current is
within 300 mV of V using the
OUT
IN
Fault State
IN
The regulator enters Fault State under any of the
following conditions:
limited to the Iss set point, which is typically 90 mA. The
linear charging current is limited to a maximum of 200 mA
to prevent any “brownout” situations where the system
voltage drops too low. During LIN1 Mode, if VOUT reaches
• V
fails to achieve the voltage required to advance
OUT
from LIN Mode to SS Mode.
• V
fails to achieve the voltage required to advance
from SS Mode to BST Mode.
V
300 mV, SS Mode is initiated. Otherwise, LIN1 Mode
OUT
IN−
expires after 512 ms and LIN2 Mode is entered. In LIN2
Mode, the current source is equal to LIN1 current source I ,
typically 90 mA. If V
1024 ms, a fault condition is declared and the device waits
20 ms (t ) to attempt an automatic restart.
ss
• Boost current limit triggers for 2 ms during BST Mode.
fails to reach V 300 mV after
OUT
IN−
• V − V
> 300 mV; this fault can only occur after
IN
OUT
successful completion of the soft−start sequence.
RST
• V < V
IN
UVLO
Soft−Start (SS) Mode
Once a fault is triggered, the regulator stops switching and
presents a high−impedance path between VIN and VOUT.
After waiting 20 ms, an automatic restart is attempted.
Upon the successful completion of LIN Mode (V
≥
OUT
V
IN−
300 mV), the regulator begins switching with boost
pulses current limited to 50% of nominal level. During SS
Mode, if V fails to reach regulation during the SS ramp
Over−Temperature Protection
OUT
The regulator shuts down if the die temperature exceeds
150°C. Restart occurs when the IC has cooled by
approximately 20°C.
sequence for more than 64 ms, a fault is declared. If a large
is used, the reference is automatically stepped slower
C
OUT
to avoid excessive input current draw.
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8
FAN48618
APPLICATION INFORMATION
Output Capacitance (COUT
The effective capacitance (C
high−value ceramic capacitors decreases as their bias
voltage increases, as illustrated in the graph below:
)
to achieve regulation within the limits described in the
) of small,
Soft−Start section above, a fault occurs, causing the circuit
to shut down. It waits about 20 ms before attempting a
restart. If the total combined output capacitance is very high,
the circuit may not start on the first attempt, but eventually
achieves regulation if no load is present. If a high current
load and high capacitance are both present during soft−start,
the circuit may fail to achieve regulation and continually
attempt soft−start, only to have the output capacitance
discharged by the load when in Fault State.
EFF (Note 5)
Output Voltage Ripple
Output voltage ripple is inversely proportional to C
.
OUT
During t , when the boost switch is on, all load current is
ON
supplied by C
.
OUT
ILOAD
VRIPPLE(P*P) + tON
@
(eq. 1)
(eq. 2)
COUT
Figure 16. CEFF for 22 mF, 0603, X5R, 10 V−Rated
and
Capacitor (SEMCO CL10A226MP8NUNE)
VIN
@ ǒ1 * Ǔ
tON + tSW @ D + tSW
VOUT
FAN48618 is guaranteed for stable operation with the
typical value of C
outlined in the table below.
therefore:
EFF
ILOAD
VIN
@ ǒ1 * Ǔ@
VRIPPLE(P*P) + tSW
Table 3. TYPICAL CEFF REQUIRED FOR STABILITY
Operating Conditions
(eq. 3)
(eq. 4)
VOUT
COUT
where:
V
OUT
(V)
V
IN
(V)
I
(mA)
C
(mF)
LOAD
EFF
1
tSW
+
5.25
2.7 to 4.5
0 to 1000
5
fSW
5. C
varies by manufacturer, capacitor material, and case size.
EFF
The maximum V
occurs when V is minimum and
IN
RIPPLE
I
is maximum. For better ripple performance, more
Inductor Selection
LOAD
output capacitance can be added.
Recommended nominal inductance value is 0.47 mH.
The FAN48618 employs valley−current limiting, so peak
inductor current can reach 3.6 A for a short duration during
overload conditions. Saturation causes the inductor current
ripple to increase under high loading, as only the valley of
the inductor current ripple is controlled.
Layout Recommendations
The layout recommendations below highlight various
topcopper pours by using different colors. To minimize
spikes at VOUT, C
must be placed as close as possible
OUT
to PGND and VOUT, as shown below. For best thermal
performance, maximize the pour area for all planes other
than SW. The ground pour, especially, should fill all
available PCB surface area and be tied to internal layers with
a cluster of thermal vias.
Startup
Input current limiting is active during soft−start, which
limits the current available to charge C
and any
OUT
additional capacitance on the V
line. If the output fails
OUT
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9
FAN48618
Figure 17. Layout Recommendation
ORDERING INFORMATION
Operating
Temperature Range
†
Part Number
Device Marking
J9
V
Package
Shipping
OUT
FAN48618BUC53X
5.25 V
−40°C to 85°C
9−Bump, 0.4 mm Pitch, Wafer−
Level Chip−Scale Package
(WLCSP)
3000 / Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
TINYBOOST is registered trademark of Semiconductor Components Industries, LLC dba “onsemi” or its affiliates and/or subsidiaries in the United States
and/or other countries.
www.onsemi.com
10
FAN48618
PACKAGE DIMENSIONS
WLCSP9 1.215x1.215x0.581
CASE 567QW
ISSUE O
onsemi,
, and other names, marks, and brands are registered and/or common law trademarks of Semiconductor Components Industries, LLC dba “onsemi” or its affiliates
and/or subsidiaries in the United States and/or other countries. onsemi owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property.
A listing of onsemi’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. onsemi reserves the right to make changes at any time to any
products or information herein, without notice. The information herein is provided “as−is” and onsemi makes no warranty, representation or guarantee regarding the accuracy of the
information, product features, availability, functionality, or suitability of its products for any particular purpose, nor does onsemi assume any liability arising out of the application or use
of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products
and applications using onsemi products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information
provided by onsemi. “Typical” parameters which may be provided in onsemi data sheets and/or specifications can and do vary in different applications and actual performance may
vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. onsemi does not convey any license
under any of its intellectual property rights nor the rights of others. onsemi products are not designed, intended, or authorized for use as a critical component in life support systems
or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should
Buyer purchase or use onsemi products for any such unintended or unauthorized application, Buyer shall indemnify and hold onsemi and its officers, employees, subsidiaries, affiliates,
and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that onsemi was negligent regarding the design or manufacture of the part. onsemi is an Equal
Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.
PUBLICATION ORDERING INFORMATION
LITERATURE FULFILLMENT:
Email Requests to: orderlit@onsemi.com
TECHNICAL SUPPORT
North American Technical Support:
Voice Mail: 1 800−282−9855 Toll Free USA/Canada
Phone: 011 421 33 790 2910
Europe, Middle East and Africa Technical Support:
Phone: 00421 33 790 2910
For additional information, please contact your local Sales Representative
onsemi Website: www.onsemi.com
◊
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