参数资料
| 型号： | SCCSP900842R2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 11/15页 |
| 文件大小： | 0K |
| 描述： | IC POWER MGT 36-WLCSP |
| 标准包装： | 3,000 |
| 应用： | PC，PDA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 36-UFBGA，WLCSP |
| 供应商设备封装： | 36-WLCSP |
| 包装： | 带卷 (TR) |
TYPICAL APPLICATIONS
FUNCTIONAL PIN DESCRIPTION
TYPICAL APPLICATIONS
V IN
C BGBYP
C IN33
BGBYP
AVIN
PVIN1
PVIN2
LDO
Regulator
Bandgap
and Ref
SM DC/DC Converter
VREGOUT
C CORE
VIN1P8
VOUTP
VOUTPFB
Load
Logic
M 1
M 4
VSW1P
C O33
Buck or
Boost
Controller
VSW1FB
Thermal
Shutdown
VSW2FB
L 33
EN
CLK26M
M 2
M 3
VSW2P
STTS
ISNS
AGND
PGND
VOUTMFB
Figure 5. 900842 Typical Applications
TYPICAL CIRCUIT
schematic for a typical application. A 1-μH inductor with
saturation current rating over 2.5 A is recommended for the
SM DC/DC converter. The inductor series DC resistance
(DCR) should be less than 55 mohm to achieve good
efficiency and a low drop-out voltage. If a smaller inductance
is used, the 900842 may become unstable under line and
load transients and the transient response time may be
affected. The 900842 is designed for ceramic capacitor in its
input and output filters. The input filter capacitor, CIN33,
reduces the voltage ripple on VIN, by providing the AC
current drawn to the M1 switch during the first part of each
switching cycle. A 10 μF ceramic capacitor should be used
for CIN33 as close as possible to the PVIN1 and PGND pins
of the IC. The triangular AC component of the inductor
current passes through the output filter capacitor, CO33,
which reduces the output voltage ripple and maintains a
constant output voltage during load and line transients. A
22 μF ceramic capacitor should be used for CO33 as close as
possible to the VOUTP and PGND pins. A 100 nF ceramic
capacitor should be used for CBGBYP as close as possible
to the BGBYP and AGND pins. A 1.0 μF ceramic capacitor
should be used for CCORE as close as possible to the
VREGOUT and AGND pins. Ceramic capacitor types such as
X5R and X7R are recommended.
900842
Analog Integrated Circuit Device Data
Freescale Semiconductor
11
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