SKY87000-13-001

Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202827B • Skyworks Proprietary Information • Products and Product Information Are Subject To Change Without Notice April 18, 2013 1
PRODUCT SUMMARY
SKY87000-13: Step-Down Regulator with Auto-Bypass LDO
for Multi-Band/Mode RF Power Amplifiers
Applications
Multi-mode RF PAs
Smartphones, mobile phones, cellular phones
Wireless USB data cards
Portable media devices
Features
Input voltage range: 2.7 to 5.5 V
Dynamic output voltage: 0.4 V to 4.25 V
0.16 V to 1.7 V reference input range
2.5 times the reference input voltage to regulator output gain
Internally compensated current/mode architecture:
2 MHz switching frequency
2.2 μH chip inductor
Two 4.7 μF output capacitors
Wide duty cycle range (100% duty cycle operation)
Integrated 85 mΩ (typical) bypass regulator
Less than 10 μs response for 1 V output step
Up to 2 A typical output current
Small 9-bump WLCSP package (MSL1, 260 °C per
JEDEC J-STD-020) package
Description
The SKY87000-13 dynamically controls the operating voltage of a
multi-mode WCDMA or GSM/EDGE Power Amplifier (PA) solution.
The SKY87000-13 outputs a voltage between 0.40 V and 4.25 V,
giving optimum efficiency for all operating states.
The output voltage of the device is controlled by an analog signal
from the baseband processor. The SKY87000-13 can support up to
2 A of total load current with step-down and bypass regulators. The
2 MHz switching frequency is optimized for a typical 2.2 μH
inductor and reduced output capacitance.
To further improve system performance, an 85 mΩ bypass linear
regulator is included that allows the PA to be powered directly from
the battery. The bypass regulator output voltage is offset from the
step-down regulator, which improves extreme load transient and
dynamic output transition performance.
The SKY87000-13 is available in a 9-bump Wafer Level Chip Scale
Package (WLCSP) with 0.5 mm pin pitch. A typical application
schematic diagram is shown in Figure 1.
4.7uF
C2
4.7uF
C1
VIN
2.2uH
L1
4.7uF
4.7uF
1nF
VOUT
EN
MODE
INL
INS
EN
MODE
AGND PGND
LX
OUT
REFIN
REFIN
EN
MODE
Figure 1. SKY87000-13 Typical Application Schematic
PRODUCT SUMMARY SKY87000-13 STEP-DOWN REGULATOR WITH AUTO-BYPASS LDO
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
2 April 18, 2013 • Skyworks Proprietary Information • Products and Product Information Are Subject To Change Without Notice • 202827B
Ordering Information
Model Name Manufacturing Part Number Evaluation Board Part Number
SKY87000-13 Step-Down Regulator with Auto-Bypass
LDO
SKY87000-13-001 SKY87000-13-001-EVB
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SKY87000-13-001

Mfr. #:
Manufacturer:
Skyworks Solutions, Inc.
Description:
Switching Voltage Regulators RF PA BUCK
Lifecycle:
New from this manufacturer.
Delivery:
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