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PCA5007 Datasheet(PDF) 64 Page - NXP Semiconductors

Part # PCA5007
Description  Pager baseband controller
PDF  112 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PCA5007 Datasheet(HTML) 64 Page - NXP Semiconductors

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1998 Oct 07
64
Philips Semiconductors
Product specification
Pager baseband controller
PCA5007
6.22.5
VOLTAGE/CURRENT RIPPLE
The ripples are determined by VBAT, inductance L, Co, ESR (Equivalent Series Resistance of Co, switching frequency
and the load current IL. The ripples are illustrated in Fig.36. If ESR = 0 Ω, then Vripple = ∆V.
Fig.35 Circuit to analyse ripples.
handbook, full pagewidth
MGR138
D1
P
N
Ci
VBAT
Co
ESR
IL
VDD
L
VC
IL
Fig.36 Zoom-in on the voltage and current ripples.
a. Normal mode.
b. Standby mode.
handbook, full pagewidth
MGR139
VDD
Tsw
tn
tp
Vripple
Iripple
∆V
IL
Imean
t
t
tn
IL
Imean
Ipeak
t



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