Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

ISL9307IRTAANGEV1Z Datasheet(PDF) 7 Page - Renesas Technology Corp

Part # ISL9307IRTAANGEV1Z
Description  3MHz Dual 1500mA Step-Down Converters and Dual Low-Input LDOs
Download  13 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

ISL9307IRTAANGEV1Z Datasheet(HTML) 7 Page - Renesas Technology Corp

Back Button ISL9307IRTAANGEV1Z Datasheet HTML 3Page - Renesas Technology Corp ISL9307IRTAANGEV1Z Datasheet HTML 4Page - Renesas Technology Corp ISL9307IRTAANGEV1Z Datasheet HTML 5Page - Renesas Technology Corp ISL9307IRTAANGEV1Z Datasheet HTML 6Page - Renesas Technology Corp ISL9307IRTAANGEV1Z Datasheet HTML 7Page - Renesas Technology Corp ISL9307IRTAANGEV1Z Datasheet HTML 8Page - Renesas Technology Corp ISL9307IRTAANGEV1Z Datasheet HTML 9Page - Renesas Technology Corp ISL9307IRTAANGEV1Z Datasheet HTML 10Page - Renesas Technology Corp ISL9307IRTAANGEV1Z Datasheet HTML 11Page - Renesas Technology Corp Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 13 page
background image
ISL9307
FN7931 Rev 3.00
Page 7 of 13
September 20, 2012
Theory of Operation
DCD1 and DCD2
Both the DCD1 and DCD2 converters on ISL9307 use the
peak-current-mode pulse-width modulation (PWM) control
scheme for fast transient response and pulse-by-pulse current
limiting. Both converters are able to supply up to 1500mA load
current.
Under light load conditions, the device enters a pulse-skipping
mode to minimize switching loss by reducing switching
frequency. Figure 2 illustrates the skip mode operation.
A zero-cross sensing circuit monitors the current flowing through
the SW node for zero crossing. When it is detected to cross zero
for 16 consecutive cycles, the regulator enters skip mode. During
the 16 consecutive cycles, the inductor current could be negative.
The counter is reset to zero when the sensed current flowing
through the SW node does not cross zero during any cycle within
the 16 consecutive cycles.
Once the converter enters skip mode, the pulse modulation is
controlled by an internal comparator while each pulse cycle
remains synchronized to the PWM clock. The P-channel MOSFET
is turned on at the rising edge of the clock and turned off when
its current reaches ~20% of the peak current limit.
As the average inductor current in each cycle is higher than the
average current of the load, the output voltage rises cycle-over-
cycle. When the output voltage is sensed to reach 1.5% above its
nominal voltage, the P-channel MOSFET is turned off
immediately, and the inductor current is fully discharged to zero
and stays at zero.
The output voltage reduces gradually due to the load current
discharging the output capacitor. When the output voltage drops
to the nominal voltage, the P-channel MOSFET turns on again,
repeating the previous operations.
The regulator resumes normal PWM mode operation when the
output voltage is sensed to drop below 1.5% of its nominal
voltage value, as shown in Figure 3.
16 CYCLES
CLOCK
IL
VOUT
0
VOUT_NOMINAL
20% PEAK CURRENT LIMIT
1.015*VOUT_NOMINAL
FIGURE 2. SKIP MODE OPERATION WAVEFORMS
vEAMP
d
iL
vOUT
vCSA
FIGURE 3. PWM OPERATION WAVEFORMS


Similar Part No. - ISL9307IRTAANGEV1Z

ManufacturerPart #DatasheetDescription
logo
Intersil Corporation
ISL9307IRTAANGEV1Z INTERSIL-ISL9307IRTAANGEV1Z Datasheet
378Kb / 13P
   3MHz Dual 1500mA Step-Down Converters and Dual Low-Input LDOs
September 20, 2012
More results

Similar Description - ISL9307IRTAANGEV1Z

ManufacturerPart #DatasheetDescription
logo
Intersil Corporation
ISL9307IRTAAJBZ-T INTERSIL-ISL9307IRTAAJBZ-T Datasheet
378Kb / 13P
   3MHz Dual 1500mA Step-Down Converters and Dual Low-Input LDOs
September 20, 2012
ISL9305 INTERSIL-ISL9305_11 Datasheet
777Kb / 17P
   3MHz Dual Step-Down Converters and Dual Low-Input LDOs
ISL9305 INTERSIL-ISL9305 Datasheet
784Kb / 17P
   3MHz Dual Step-Down Converters and Dual Low-Input LDOs
ISL9305H INTERSIL-ISL9305H Datasheet
656Kb / 16P
   3MHz Dual 1.5A Step-Down Converters and Dual Low-Input LDOs with I2C Compatible
ISL9305IRTAANLZ-T INTERSIL-ISL9305IRTAANLZ-T Datasheet
568Kb / 16P
   3MHz Dual Step-Down Converters and Dual Low-Input LDOs with I2C Compatible Interface
February 9, 2015
logo
Renesas Technology Corp
ISL9305 RENESAS-ISL9305 Datasheet
924Kb / 17P
   3MHz Dual Step-Down Converters and Dual Low-Input LDOs with I2C Compatible Interface
logo
Intersil Corporation
ISL9305IRTHAANLZ-T INTERSIL-ISL9305IRTHAANLZ-T Datasheet
664Kb / 17P
   3MHz Dual 1.5A Step-Down Converters and Dual Low-Input LDOs with I2C Compatible Interface
October 5, 2011
ISL9305H INTERSIL-ISL9305H_11 Datasheet
666Kb / 17P
   3MHz Dual 1.5A Step-Down Converters and Dual Low-Input LDOs with I2C Compatible Interface
logo
Renesas Technology Corp
ISL9305H RENESAS-ISL9305H Datasheet
808Kb / 17P
   3MHz Dual 1.5A Step-Down Converters and Dual Low-Input LDOs with I2C Compatible Interface
logo
Maxim Integrated Produc...
MAX16922 MAXIM-MAX16922 Datasheet
1Mb / 16P
   2.2MHz, Dual, Step-Down DC-DC Converters, Dual LDOs, and RESET
Rev 0; 10/09
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com