Electronic Components Datasheet Search |
|
MAX1855 Datasheet(PDF) 13 Page - Maxim Integrated Products |
|
MAX1855 Datasheet(HTML) 13 Page - Maxim Integrated Products |
13 / 33 page High-Speed, Adjustable, Synchronous Step-Down Controllers with Integrated Voltage Positioning ______________________________________________________________________________________ 13 Pin Description (continued) PIN NAME FUNCTION 21 SKIP Pulse-Skipping or Low-Noise Mode Control Input. Connect to VCC for low-noise forced-PWM mode. Connect to GND to enable pulse-skipping operation. Low-noise forced-PWM mode causes inductor current recirculation at light loads and suppresses pulse-skipping operation. Normal operation prevents current recirculation. SKIP can also be used to disable both overvoltage and undervoltage protection circuits and clear the fault latch (see No-Fault Test Mode). Do not leave SKIP floating. 22 BST Boost Flying-Capacitor Connection. Connect to an external capacitor and diode according to the standard application circuit (Figure 1). 23 LX External Inductor Connection. Connect LX to the switched side of the inductor. LX serves as the lower supply rail for the DH high-side gate driver. LX does not connect to the current-limit comparator. 24 CS Current-Sense Input. Connect a resistor (RSENSE) between CS and PGND. The current-limit threshold is set by ILIM. If the current-sense signal (Inductor Current ✕ RSENSE) exceeds the current-limit threshold, the MAX1716/MAX1854/MAX1855 will not initiate a new cycle. COMPONENT CIRCUIT 1 (FIGURE 1) CIRCUIT 2 (FIGURE 11) CIRCUIT 3 (FIGURE 12) CIRCUIT 4 (FIGURE 13) Output Voltage 1.6V 1.3V 1.0V 1.6V Input Voltage Range 7V to 24V 7V to 24V 7V to 24V 7V to 24V Maximum Load Current 18A 12A 12A 18A Inductor 0.68 µH Sumida CDEP134H-0R6 or Panasonic ETQP6F0R6BFA 1 µH Sumida CEP125-1R0MC or Panasonic ETQP6FIRIBFA 0.68 µH Sumida CDEP134H-0R6 or Panasonic ETQP6F0R6BFA 0.47 µH Sumitomo CXE-R47 TON Level Float Float REF GND Frequency 300kHz 300kHz 400kHz 550kHz High-Side MOSFET International Rectifier (2) IRF7811 International Rectifier IRF7811 International Rectifier IRF7811 International Rectifier (2) IRF7811 Low-Side MOSFET Fairchild (2) FDS7764A Or International Rectifier (2) IRF7811 Fairchild (2) FDS7764A Or International Rectifier (2) IRF7811 Fairchild (2) FDS7764A Or International Rectifier (2) IRF7811 Fairchild (2) FDS7764A Or International Rectifier (2) IRF7811 Input Capacitor (5) 10 µF Taiyo Yuden TMK432BJ106 (4) 10 µF Taiyo Yuden TMK432BJ106 (4) 10 µF Taiyo Yuden TMK432BJ106 (5) 10 µF Taiyo Yuden TMK432BJ106 Output Capacitor (5) 220 µF Panasonic EEFUE0E221R (4) 220 µF Panasonic EEFUE0E221R (4) 220 µF Panasonic EEFUE0E221R (8) 47 µF Taiyo Yuden JMK432BJ476MM or TDK C4532X5ROJ476M Current-Sense Resistor 3m Ω 3.5m Ω 3.5m Ω 3m Ω ILIM Level VREF/3 VREF/4 VREF/4 VREF/3 Voltage-Positioning Resistor Ratio 1:1 (0.5x) 1:2 (0.66x) 1:2 (0.66x) 1:1 (0.5x) Table 1. Component Selection for Standard Applications |
Similar Part No. - MAX1855 |
|
Similar Description - MAX1855 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | 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 |