SKY87020_12_203958A.pdf

DATA SHEET
SKY87020-12: Power Management IC for the SkyBlue™
System
Applications
Description
 Smartphones
The SKY87020-12 is a high-efficiency RF front-end power
management IC for APT RF power amplifier (PA) applications in
portable battery powered devices. This IC includes a
high-efficiency DC-DC voltage converter with a 4.5 V reference
supply to provide a user-programmable RF PA APT supply for a
2.5 V to 5.5 V input range.
 3G/4G multimode front-end modules
 Tablets, eBook readers
 Wireless data cards
Features
 Input voltage range: 2.5 V to 5.5 V
 High-efficiency converter:
 Output voltage range optimized for SkyBlue™ PA operation
 4.5 V, 3 mA PA bias supply output:
 IC disable VIN bypass
 Over-temperature and short-circuit protection
 Small footprint CSP (16-ball, 2.005 mm  2.005 mm) package
(MSL1, 260 C per JEDEC J-STD-020)
The SKY87020-12 also provides an additional 4.5 V bias supply
for RF PA operation. This bias voltage output can supply load
currents up to 3 mA and is available whenever the device is
enabled. When the device is disabled, the VIN supply is bypassed
to the 4V5 output.
The SKY87020-12 is available in a 16-pin, 2.005 mm 
2.005 mm Chip Scale Package (CSP) package.
A typical application circuit is shown in Figure 1. The pin
configuration is shown in Figure 2. Signal pin assignments and
functional pin descriptions are provided in Table 1.
Skyworks GreenTM products are compliant with
all applicable legislation and are halogen-free.
For additional information, refer to Skyworks
Definition of GreenTM, document number
SQ04–0074.
L1
1.5 µH
VIN
C5
4.7 µF
IN
GND
SW
VOUT
OUT
C+
C6
0.1µF
C2
0.1 µF
C3
0.1µF
PGND
C−
PGND
SKY87020
C7
1.0 µF
GND
PGND
PGND
IC Enable Input
IC Reference Control Input
4.5 V Bias Supply Output
EN
VREF
4V5
GND
C4
0.47 µF
PGND
AGND
GND
GND
203958-001
PGND
GND
Figure 1. Typical Application Circuit (Programmable Output)
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DATA SHEET • SKY87020-12: POWER MANAGEMENT IC FOR THE SKYBLUE™ SYSTEM
A
B
C
D
1
2
3
4
PGND
PGND
IN
AGND
A1
A2
A3
A4
SW
SW
GND
GND
B1
B2
B3
B4
OUT
PGND
GND
VREF
C1
C2
C3
C4
4V5
C−
C+
EN
D1
D2
D3
D4
203958-002
Figure 2. SKY87020-12 Pinout
(Top View)
Table 1. SKY87020-12 Signal Pin Assignments and Descriptions
Pin
Name
Description
A1, A2
PGND
Power ground.
A3
IN
Input supply voltage connection. Bypass with a 4.7μF or greater value ceramic capacitor placed between the power supply input to the
L1 inductor input and AGND. Place an additional 0.1μF ceramic bypass capacitor between the IN pin and PGND.
A4
AGND
Analog/signal ground.
B1, B2
SW
Inductor connection. Connect a 1.5 or 2.2 H inductor between this pin and the input source power supply.
B3, B4, C3
GND
Ground termination. Ground pins should be connected to AGND.
C1
OUT
Regulated voltage output pin. Bypass the regulated output supply pin with a 1.0 F ceramic capacitor to AGND and a 0.1 F ceramic
capacitor to PGND.
C2
PGND
Power ground.
C4
VREF
IC Reference control input pin. Connect this pin to the system VREF control output to set IC operating state.
D1
4V5
4.5 V Regulated bias supply output. Bypass this supply output with a 0.47 F ceramic capacitor connected between this pin and PGND.
D2
C-
Capacitor connection. Connect a 0.1 F ceramic capacitor between this pin and C+.
D3
C+
Capacitor connection. Connect a 0.1 F ceramic capacitor between this pin and C−.
D4
EN
IC Enable input pin. Connect this pin to the system enable control output.
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DATA SHEET • SKY87020-12: POWER MANAGEMENT IC FOR THE SKYBLUE™ SYSTEM
Electrical and Mechanical Specifications
The absolute maximum ratings of the SKY87020-12 are provided
in Table 2, the thermal information is listed in Table 3, and
electrical specifications are provided in Table 4.
The RF front-end system is controlled by the MIPI RFFE control
interface. Table 5 shows the register map, which outlines
functions and controls that are accessible through the MIPI RFFE
control interface to manage the SKY87020-12 PMIC.
Figure 3 shows a functional block diagram of the SKY87020-12.
Figures 4 through 11 show the typical performance
characteristics for the SKY87020-12 at TA = −30 ºC to 85 ºC, and
typical values are for TA = 25 ºC.
Table 2. Absolute Maximum Ratings1
Parameter
Symbol
Minimum
Maximum
Units
IN supply
VIN
−0.3
6.0
V
SW, OUT
VSW, VOUT
−0.3
12
V
C+, C−, 4V5
VC+, VC−, V4V5
−0.3
VIN + 0.3
V
EN, VREF
VEN, VVREF
−0.3
6.0
V
1 Exposure to maximum rating conditions for extended periods may reduce device reliability. There is no damage to device with only one parameter set at the limit and all other parameters set
at or below their nominal value. Exceeding any of the limits listed may result in permanent damage to the device.
Table 3. SKY87020-12 Thermal Information
Maximum
Units
Operating junction temperature range
Parameter
TJ
Symbol
Minimum
−30
Typical
150
ºC
Storage temperature range
TSTG
−65
150
ºC
Maximum soldering temperature (@ ball, 10 sec)
TBALL
300
ºC
16-Ball 2.005 mm  2.005 mm CSP Thermal Impedance
Junction to ambient thermal resistance1
JA
81
ºC/W
Junction to package top thermal difference
JT
6
ºC/W
34
ºC/W
1.54
W
Junction to board thermal difference
JB
Maximum power dissipation2
PD
1 The thermal resistance is measured in accordance with EIA/JESD 51 series.
2 When TA = 25 ºC
ESD HANDLING: Although this device is designed to be as robust as possible, electrostatic discharge (ESD) can damage this device. This
device must be protected at all times from ESD when handling or transporting. Static charges may easily produce
potentials of several kilovolts on the human body or equipment, which can discharge without detection. Industrystandard ESD handling precautions should be used at all times.
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DATA SHEET • SKY87020-12: POWER MANAGEMENT IC FOR THE SKYBLUE™ SYSTEM
Table 4. SKY87020-12 Device Electrical Characteristics1 (1 of 2)
(VCC = 3.8 V, VOUT = 9.5 V, C1 = 4.7 μF, C2 = 1.0 μF, C3 = C5 = C6 = 0.1 μF, C4 = 0.47 μF, L1 = 1.5 μH, TA = −30 °C to +85 °C,
Unless Otherwise Noted. TA = 25 °C [Typical])
Parameter
Symbol
Test Conditions
Min
Typ
Max
Units
3.8
5.5
V
General Operating Conditions
Input voltage range
VIN
2.5
Bypass mode, EN = VIN; no load (IOUT = 0 A)
0.45
No load supply current
IQ
Step-Up mode, VREF = 2.00 no load
(IOUT = 0 A), Switching
13
Shutdown current
ISHDN
EN = AGND = PGND
0.1
Output voltage range
VOUT
EN = VIN; VREF = 0.52 to 2.32
2.5
Output voltage accuracy
VOUT[TOL]
EN = VIN; VREF = 2.0 V, ILOAD ≤ 110 mA
−1.5
Output load current
IOUT
Switching current limit
ILIM(SW)
Switching frequency
fOSC
Maximum boost switching duty cycle
DMAX
Line regulation
VOUT/VOUT/VIN
Load regulation
VOUT/VOUT
mA
1
μA
11
V
DC-DC Step-Up (Boost) Regulator
1.5
%
110
300
mA
TA = 25 ºC
2.5
2.7
A
No load, TA = 25 ºC
1.8
2.25
MHz
90
%
VIN = 5.5 V to 2.5 V, VOUT = 9.5 V
(VREF = 2.0 V), ILOAD = 110 mA
0.02
%/V
VIN = 3.8 V, ILOAD = 30 to 110 mA
1.15
11.5
11.9
%
Over voltage protection threshold
VOVP
PMOS synchronous switch on-resistance
RDS[ON]H
VIN = 3.8 V, VOUT = 9.5 V; TA = 25 C
280
mΩ
NMOS low-side switch on resistance
RDS[ON]L
VIN = 3.8 V,VOUT = 9.5 V; TA = 25 C
150
mΩ
Turn-on time
tSS[ON]
VIN = 3.8 V; EN transition low to high,
VOUT = 0 to 90% of 3.8 V, ILOAD = 10 mA
60
μs
Output switching ripple
VOUT_RIPPLE
VIN = 3.8 V, VREF = 2.0 V, ILOAD = 110 mA
100
mVpp
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2.0
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DATA SHEET • SKY87020-12: POWER MANAGEMENT IC FOR THE SKYBLUE™ SYSTEM
Table 4. SKY87020-12 Device Electrical Characteristics1 (2 of 2)
(VCC = 3.8 V, VOUT = 9.5 V, C1 = 4.7 μF, C2 = 1.0 μF, C3 = C5 = C6 = 0.1 μF, C4 = 0.47 μF, L1 = 1.5 μH, TA = −30 °C to +85 °C,
Unless Otherwise Noted. TA = 25 °C [Typical])
Parameter
Symbol
Test Conditions
Min
Typ
3.0
3.2
Max
Units
50
mA
5.4
V
2G Mode Output Operation (4.5 V output)
2G mode output voltage
VOUT2G
2.5 V ≤VIN < 3.2 V, VREF = 0 V, ILOAD = 50 mA
2G mode output current
IOUT2G
VREF = 0 V
2G mode boost supply over voltage protection
threshold
OVP2G
VIN = 3.2 V; VREF = 0 V
4.5
VIN = 3.8 V; ILOAD = 30 mA
1.5
V
Step-Down Voltage Operation
Output voltage
VOUT
Maximum output load current
ILOAD
VIN≤ 3.2 V (step-down bypass mode)
1.8
2.0
V
VIN
30
mA
4.5
5.5
V
1.5
3
4.5 V Bias Supply Regulator
Output voltage range
VOUT
EN = VIN
Output operating current
IOUT
2.5 V < VIN ≤ 4.5 V
Line regulation
VOUT/VOUT/VIN
VIN = 2.5 V to 4.4 V, VOUT = 4.5 V; no load
Load regulation
VOUT/VOUT
VIN = 3.8 V, ILOAD = 0 to 3 mA
Output switching ripple
VOUT_RIPPLE
Enable threshold low
4.4
2
mA
%/V
3
%
VIN = 3.8 V, ILOAD = 3 mA
150
mVPP
VEN(L)
2.5 V ≤ VIN ≤ 5.5 V
0.4
Enable threshold high
VEN(H)
2.5 V ≤ VIN ≤ 5.5 V
Enable input leakage current
IEN[LEAK]
EN = VIN = 3.8 V
Reference input voltage range
VREF
Reference gain
AVREF
VREF to VOUT gain
Under voltage lock-out threshold
VUVLO(TH)
VIN rising, latch off
Over temperature shutdown threshold
tSHDN
Temp. rising, latch off
Enable and Control
V
1.4
20
0
μA
2.32
4.75
V
V/V
Protection Features
2.49
150
V
ºC
1 Performance is guaranteed only under the conditions listed in this table.
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DATA SHEET • SKY87020-12: POWER MANAGEMENT IC FOR THE SKYBLUE™ SYSTEM
Table 5. SKY87020-12 MIPI RFFE 2.0 Control (1 of 2)
Register
Class
Register
Address
(hex)
STATIC
PMIC
CONTROL
0x00
VREF
CONTROL
0x01
0x1A
RFFE
Reserved
0x1B
Register
Name
STATIC_
PMIC_
CONFIG0
VREF_CONF
IG0
RFFE
STATUS
Group SID
Data
Bits
Default
7
0
Reserved
Reserved per RFFE standard
6:3
0000
Reserved
Reserved. Set to 0, not hardware accessible
PMIC Operating Mode
0x0: Disable
0x1: Standby (forced bypass)
0x2: Enable 3G/4G Mode
0x3: Enable 2G mode
0x4: Enable 3G/4G Mode
0x5: Disable
Vcc_VREF
VREF output select, default value
0x38h
0x00-0x22: 0.32 V
0xFF: 100% full scale
0x0: Normal Operation
0x1: Software Reset
2:0
000
8
00111000
Bit Name
Description
7
0
Software Reset
Reset all configurable registers to
default values except for USID,
GSID and PM_TRIG. RFFE status is
reset after read
6
0
COMMAND_FRAME_PARITY_
ERR
Command sequence received with
parity error – discard command
0x0: Normal Operation
0x1: Error
5
0
COMMAND_LENGTH_ERR
Command length error - RFFE
status is reset after read
0x0: Normal Operation
0x1: Error
4
0
ADDRESS_FRAME_PARITY_
ERR
Address frame with parity error RFFE status is reset after read
0x0: Normal Operation
0x1: Error
3
0
DATA_FRAME_PARITY_ERR
Data frame with parity error - RFFE
status is reset after read
0x0: Normal Operation
0x1: Error
2
0
READ_UNUSED_REG
Read command to an invalid
address - RFFE status is reset after
read
0x0: Normal Operation
0x1: Read
1
0
WRITE_UNUSED_REG
Write command to an invalid
address - RFFE status is reset after
read
0x0: Normal Operation
0x1: Write
0
0
BID_GID_ERR
Read command with a
BROADCAST_ID or GROUP_ID RFFE status is reset after read
0x0: Normal Operation
0x1: Read
7:4
0000
Reserved
3:0
0000
GSID
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DATA SHEET • SKY87020-12: POWER MANAGEMENT IC FOR THE SKYBLUE™ SYSTEM
Table 5. SKY87020-12 MIPI RFFE 2.0 Control (2 of 2)
Register
Class
RFFE
Reserved
Register
Address
(hex)
0x1C
Register Name
RFFE Power
Mode and
Trigger
0x1D
Product ID
0x1E
Manufacturer ID
0x1F
Manufacturer
and User ID
Data
Bits
Default
Bit Name
Description
7:6
10
Software Reset
0x0: Normal Mode (ACTIVE)
0x1: Default Setting (STARTUP)
0x2: Low Power Mode
0x3: Reserved
5
0
Trigger Mask 2
0x0: Data writes are masked
0x1: Data writes go directly to register
4
0
Trigger Mask 1
0x0: Data writes are masked
0x1: Data writes go directly to register
3
0
Trigger Mask 0
0x0: Data writes are masked
0x1: Data writes go directly to register
2
0
Trigger 2
0x0: No Action
0x1: Data transferred from shadow register to active register
1
0
Trigger 1
0x0: No Action
0x1: Data transferred from shadow register to active register
0
0
Trigger 0
0x0: No Action
0x1: Data transferred from shadow register to active register
7:0
10100000
Product ID [7:0]
PROD ID: 0xA0h
10100101
Manufacturer ID LSB [7:0]
MFR ID: 0x1A5h
7:6
00
Reserved
5:4
01
Manufacturer ID MSB [9:8]
MFR ID: 0x1A5h
3:0
0100
USID
PMIC User Slave ID: 0x04h
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DATA SHEET • SKY87020-12: POWER MANAGEMENT IC FOR THE SKYBLUE™ SYSTEM
Figure 3. SKY87020-12 Functional Block Diagram
Functional Description
The SKY87020-12 has three main functional blocks, a DC-DC
boost converter, a 4.5 V charge pump boost converter and a nonregulating charge pump voltage divider. The operation of each
block is conditional on the applied input supply voltage (VIN) and
the controlling reference input signal level (VREF). There are
output operating voltage states that can be set by the applied
VREF signal that cannot be supported by either the DC-DC boost
or divide-by-2 charge pump. In these cases, the device output will
default to bypass the input supply from VIN to OUT. The theory of
the device and system operation is to always supply the
requested voltage or greater to the load circuit (SkyBlue™ PA). To
support 2G PA operation, the SKY87020-12can supply a 3.2 V
bias supply when the system supply voltage drops to or below
3.2 V.
DC-DC Boost Converter Section
DC-DC boost converter can supply a boost output voltage from
2.5 V to 11.0 V from a 2.5 V to 5.5V input supply range and
supports load current levels up to 300 mA. Step-Up power
conversion is achieved through a multimode PFM/PWM control
architecture to achieve the maximum possible boost mode
efficiency over the varied input and output voltage and load
current conditions. The high 1.8 MHz switching frequency
operation permits fast transient response and is capable of wide
duty cycle ranges up to 90%. The switching frequency is reduced
to 1.4 MHz (typical) when VOUT is set to levels below 7 V to save
IC operating quiescent current at low output voltage/light load
conditions to improve power conversion efficiency. To simplify the
operation and use, the switching regulator is internally
compensated to eliminate the need for additional external
compensation network components. The high switching
frequency is optimized to reduce external components sizes and
values (1.5 μH inductor typical with 4.7 uF input/1.0 uF output
capacitors) for space constrained applications. Upon IC enable,
the output capacitor will be charged to the level of VIN in less than
60 μs to aid in fast output voltage step response timing.
The Boost converter has a quick-start circuit to support fast
voltage step response at IC start-up and at any time the applied
VREF signal causes the boost output step-up to increase by 1V or
more. To achieve <20 μs voltage step timing with a 1.0 μF output
capacitor, the boost quick-start circuit allows peak inductor
current to flow at the over current limit threshold (2.5 A typical,
2.7 A maximum) level for several switch mode clock cycles to
speed charging of the output capacitor. For this reason an
inductor must be used with a saturation current rating equal to or
greater than the specified over current protection threshold level
(2.7 A maximum).
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DATA SHEET • SKY87020-12: POWER MANAGEMENT IC FOR THE SKYBLUE™ SYSTEM
Typical Performance Characteristics
(VCC = 3.8 V, VOUT = 9.5 V, C1 = 4.7 μF, C2 = 1.0 μF, C3 = C5 = C6 = 0.1 μF, C4 = 0.47 μF, L1 = 1.5 μH,
TA = −30 °C to +85 °C, Unless Otherwise Noted. TA = 25 °C (Typical))
5.0
20
–30 ºC
25 ºC
85 ºC
18
3.0
2.5
2.0
1.5
1.0
0.5
3.5
4.0
4.5
5.0
12
10
8
6
25 ºC
–30 ºC
85 ºC
4
0
2
5.5
2.5
3
3.5
Input Voltage - VIN (V)
90
1
0.5
0
-0.5
25 ºC
–30 ºC
85 ºC
50
100
150
200
250
Boost Output Load Current (mA)
Figure 6. DC-DC Boost Regulator Load Regulation over
Temperature
300
Switch Mode Duty Cycle (%)
1.5
203958-006
Boost VOUT Load Regulation (%)
100
-2
0
5
5.5
6
Figure 5. Switch Mode Quiescent Current vs Input Supply over
Temperature (VOUT = 9.5 V)
2
-1.5
4.5
Input Voltage (V)
Figure 4. Bypass Mode Quiescent Current vs Input Voltage over
Temperature (VOUT = VIN)
-1
4
80
70
60
50
40
30
DC for VIN = 2.5 V
DC for VIN = 3.8 V
DC for VIN = 5.5 V
20
10
203958-007
3.0
14
2
0
2.5
16
203958-005
3.5
Quescent Current (mA)
4.0
203958-004
Quescent Current - Iq (mA)
4.5
0
2
3
4
5
6
7
8
9
10
11
12
Output Voltage (V)
Figure 7. DC-DC Boost Switching Duty Cycle vs Output Voltage
over Temperature
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DATA SHEET • SKY87020-12: POWER MANAGEMENT IC FOR THE SKYBLUE™ SYSTEM
Typical Performance Characteristics
1.9
100
1.85
90
1.8
80
1.75
70
1.65
1.6
1.55
1.5
25 ºC
–30 ºC
85 ºC
1.45
1.4
1.35
1.3
3
4
5
6
7
8
9
10
11
50
40
30
25 ºC
–30 ºC
85 ºC
20
10
0
12
0
25
50
Figure 8. Switching Frequency vs Output Voltage over
Temperature (VIN = 3.8 V, ILOAD = 100 mA)
125
150
175
200
225
275
300
1.4
90
70
60
50
30
ILOAD = 60 mA
20
ILOAD = 110 mA
10
ILOAD = 200 mA
3
3.5
4
4.5
5
203958-010
40
5.5
Input Supply Voltage (V)
Figure 10. DC-DC Boost Efficiency vs Input Supply (VOUT = 9.5 V)
Enable Input Threshold (V)
1.2
80
1
0.8
0.6
25 ºC VIH
25 ºC VIL
85 ºC VIH
85 ºC VIL
–30 ºC VIH
–30 ºC VIL
0.4
0.2
0
2
2.5
3
3.5
4
4.5
5
5.5
6
Input Supply Voltage (V)
Figure 11. Enable Input Threshold vs Input Supply Voltage over
Temperature
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10
250
Figure 9. DC-DC Boost Efficiency vs Load Current over
Temperature (VIN = 3.8 V, VOUT = 9.5 V)
100
Efficiency (%)
100
Boost Output Load Current (mA)
Output Voltage (V)
0
2.5
75
203958-011
2
60
203958-009
Efficiency (%)
1.7
203958-008
Switching Frequency (MHz)
(VCC = 3.8 V, VOUT = 9.5 V, C1 = 4.7 μF, C2 = 1.0 μF, C3 = C5 = C6 = 0.1 μF, C4 = 0.47 μF, L1 = 1.5 μH,
TA = −30 °C to +85 °C, Unless Otherwise Noted. TA = 25 °C (Typical))
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DATA SHEET • SKY87020-12: POWER MANAGEMENT IC FOR THE SKYBLUE™ SYSTEM
Application Connection Schematic Description
A typical application connection schematic diagram is provided in
Figure 12. Component values for the SKY87020-12 application
connection schematic are listed in Table 6.
L1
1.5 µH
VIN
C5
4.7 µF
SW
IN
C+
C6
0.1µF
GND
VOUT
OUT
C2
0.1 µF
C3
0.1µF
PGND
C−
PGND
SKY87020
C7
1.0 µF
GND
PGND
PGND
IC Enable Input
IC Reference Control Input
4.5 V Bias Supply Output
EN
VREF
4V5
PGND
AGND
GND
C4
0.47 µF
GND
GND
203958-012
GND
PGND
Figure 12. SKY87020-12 Typical Application Connection Schematic
Table 6. Recommended Components Selection
Component
Power inductor
Reference Designator
L1
Details
Part Number
1.5 H, 76 m (or lower) DCR, 2520
TFM252010GHM-1R5MTAA (TDK) or
DFE252010F-1R5M (TOKO)
2.2 H, 97 m (or lower) DCR, 2520
DFE252010F-2R2M (TOKO)
OUT bypass capacitor
C2
0.1 F, 0402, X5R, 25 V
C1005X5R1E104K050BC (TDK)
Flying capacitor
C3
0.1 F, 0402, X5R, 10 V
C1005X5R1A104K050BA (TDK)
4.5 V supply capacitor
C4
0.47 F, 0402, X5R, 10 V
C1005X5R1A474K050BB (TDK)
Input capacitor
C5
4.7 F, 0603, X5R, 10 V
C1608X5R1A475K080AC (TDK)
IN bypass capacitor
C6
0.1 F, 0402, X5R, 10 V
C1005X5R1A104K050BA (TDK)
Output capacitor
C7
1.0 F, 0603, X6S, 25 V
C1608X6S1E105K080AB (TDK)
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DATA SHEET • SKY87020-12: POWER MANAGEMENT IC FOR THE SKYBLUE™ SYSTEM
PCB Layout Recommendations
The DC-DC converter PCB layout should follow these
recommendations to achieve optimum performance for the
system:
 The power ground island should then be connected to the
system power return at a single point to maintain maximum
switching noise isolation to adjacent circuits.
 The IC pinout and external component placement has been
arranged so the power flow is from left to right on the layout
and all RF PA interconnections can be made from the right side
on the IC on the top layer
 The input capacitor C5 and output capacitor C7 should be
connected to the system ground plane common with the RF PA
system grounding
 Ferrite beads may also be added in series with the VBATT
supply input, output (OUT) and bias supply output (4V5 output)
to further reduce high frequency noise into and out of this
power supply circuit.
 All external components should be placed as close as possible
to the IC pin connections.
 Power ground must be placed on a bottom, middle layer, or
power ground layer on a multi-layer PCB Layout. It is preferable
to have the power ground plane/layer on the mid/inner layer 1
right below the top layer.
Figure 13 shows the recommended PCB layout with components.
 The IC PGND, 4V5 capacitor (C4), input capacitor (C6), and
output capacitor (C2) should all be connected to a power ground
island with as many interconnecting vias as possible to achieve
the lowest connection impedance between the circuit nodes.
VREF
A4
B4
C4
D4
A3
B3
C3
D3
A2
B2
C2
D2
A1
B1
C1
D1
U1
C6
EN
C3
C4
C5
4V5
VOUT
VBATT
L1
Top Layer
System Ground Plane on Top Layer
Power Ground Layer on Mid Layer 1
C2
C7
203958-013
Vias to System Ground Planes
Vias to Power Ground Planes
Vias to Connect Power Ground Layer on Mid Layer 1 to System Ground Plane
Figure 13. Recommended PCB Layout with Components
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May 16, 2016 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 203958A
DATA SHEET • SKY87020-12: POWER MANAGEMENT IC FOR THE SKYBLUE™ SYSTEM
Package Dimensions
when the part is subjected to high temperature during solder
assembly.
The PCB layout footprint for the SKY87020-12 is provided in
Figure 14. Typical part markings for the SKY87020-12 are shown
in Figure 15. Package dimensions are shown in Figure 16. Tape
and reel dimensions are shown in Figure 17.
The SKY87020-12 is rated to Moisture Sensitivity Level 1 (MSL1)
at 260 C. It can be used for lead or lead-free soldering. For
additional information, refer to the Skyworks Application Note,
Solder Reflow Information, and document number 200164.
0.750 ± 0.008
0.250 ± 0.008
0.250 ± 0.008
0.750 ± 0.008
Instructions on the shipping container label regarding exposure to
moisture after the container seal is broken must be followed.
Otherwise, problems related to moisture absorption may occur
0.000
Care must be taken when attaching this product, whether it is
done manually or in a production solder reflow environment.
Production quantities of this product are shipped in a standard
tape and reel format.
Package and Handling Information
16X Ø0.250
0.750 ± 0.008
A
0.250 ± 0.008
B
0.000
0.250 ± 0.008
C
0.750 ± 0.008
D
1
2
3
4
All measurements are in millimeters.
203577-014
Figure 14. SKY87020-12 PCB Layout Footprint
Pin 1
Indicator
Skyworks Part Number
Lot Code
Date Code:
YY = Year
WW = Week
CC = Country
203958-015
Figure 15. SKY87020-12 Typical Part Markings
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A
A
B
C
0.250 ± 0.008
0
0.250 ± 0.008
D
0.750 ± 0.008
D
2.005 ± 0.025
1
2
3
16X Ø0.310± 0.047
0.750 ± 0.008
B
Pin A1 Corner
Index Area
0.750 ± 0.008
0.695 Max
0.405 ± 0.020
0.250 ± 0.008
0
0.250 ± 0.008
2.005 ± 0.025
0.750 ± 0.008
DATA SHEET • SKY87020-12: POWER MANAGEMENT IC FOR THE SKYBLUE™ SYSTEM
4
See Note 4
C
4
0.245 Nom
Bump Side Down
3
2
1
Bump Side Up
Side View
Notes:
1. All dimensions are in millimeters unless otherwise specified.
2. Marking shown is for package orientation reference only.
3. Ball height tolerance is ±10% of nominal ball height.
4. Package thickness includes backside laminate.
203958-016
Figure 16. SKY87020-12 Package Dimensions
4.00 ±0.10
2.00 ±0.05
4.00 ±0.10
Ø
1.50 +0.10
Pin 1
A
1.75 ±0.10
5° Max
3.50 ±0.05
8.00 +0.30
–0.10
2.35 ±0.05 (Bo)
B
0.254 ±0.02
B
A
Ø
0.80 ±0.05 (Ko)
1.00 +0.25
5° Max
Section A
2.20 ±0.05 (Ao)
Note: All dimensions are in millimeters.
Section B
203577-017
Figure 17. SKY87020-12 Tape and Reel Dimensions
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May 16, 2016 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 203958A
DATA SHEET • SKY87020-12: POWER MANAGEMENT IC FOR THE SKYBLUE™ SYSTEM
Ordering Information
Model Name
SKY87020-12: Power Management IC for the SkyBlue™ System
Manufacturing Part Number
SKY87020-12-001
Evaluation Board Part Number
SKY87020-12-EVB
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