Electronic Components Datasheet Search |
|
ADP1607-EVALZ Datasheet(PDF) 10 Page - Analog Devices |
|
ADP1607-EVALZ Datasheet(HTML) 10 Page - Analog Devices |
10 / 16 page ADP1607 Data Sheet Rev. C | Page 10 of 16 THEORY OF OPERATION SW + + VIN N RESET AGND GND TSENSE TREF 1 VDD L1 A VOUT COUT 5 2 4 EN VIN S R QP QN RP VSEL SW P 6 VSEL VIN OFF ON 3 FB R1 R2 VOUT CIN VREF PFM COMPARATOR PWM COMPARATOR CURRENT-LIMIT COMPARATOR TSD COMPARATOR PFM CONTROL SHUTDOWN ZERO CROSS PMOS BULK CONTROL P DRIVER CURRENT SENSING N DRIVER OSCILLATOR SOFT START RCOMP CCOMP ERROR AMPLIFIER VREF BULK CONTROL VOUT Figure 24. Block Diagram OVERVIEW The ADP1607 is a high efficiency, synchronous, fixed frequency, step-up dc-to-dc switching converter with an adjustable output voltage between 1.8 V and 3.3 V for use in portable applications. The 2 MHz operating frequency enables the use of small footprint, low profile external components. Additionally, the synchronous rectification, internal compensation, internal fixed current limit, and current-mode architecture allow for excellent transient response and a minimal external part count. Other key features include fixed PWM and light load PFM mode options, true output isolation, thermal shutdown (TSD), and logic controlled enable. ENABLE/SHUTDOWN The EN input turns the ADP1607 on or off. Connect EN to GND or logic low to shut down the part and reduce the current consumption to 0.06 µA (typical). Connect EN to VIN or logic high to enable the part. Do not exceed VIN. Do not leave this pin floating. MODES OF OPERATION The ADP1607 is available in a fixed PWM mode only option for noise sensitive applications or in an auto PFM-to-PWM transitioning mode option to optimize power at light loads. Pulse-Width Modulation (PWM) Mode The PWM version of the ADP1607 utilizes a current-mode PWM control scheme to force the part to maintain a fixed 2 MHz fixed frequency while regulating the output voltage over all load conditions. The auto mode version of the ADP1607 operates in PWM for higher load currents. In PWM, the output voltage is monitored at the FB pin through the external resistive voltage divider. The voltage at FB is compared to the internal 1.259 V reference by the internal error amplifier. This current- mode PWM regulation system allows fast transient response and tight output voltage regulation. PWM mode operation results in lower efficiencies than PFM mode at light loads. Auto Mode Auto mode is a power-saving feature that forces the auto version of the ADP1607 to switch between PFM and PWM in response to output load changes. The auto version of the ADP1607 |
Similar Part No. - ADP1607-EVALZ |
|
Similar Description - ADP1607-EVALZ |
|
|
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 |
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 |