Dual, Interleaved, Step-Down DC-to-DC Controller with Tracking ADP1829
www.DataSheet4U.com
FEATURES
Fixed frequency ope...
Dual, Interleaved, Step-Down DC-to-DC Controller with Tracking ADP1829
www.DataSheet4U.com
FEATURES
Fixed frequency operation: 300 kHz, 600 kHz, or synchronized operation up to 1 MHz Supply input range: 3.0 V to 18 V Wide power stage input range: 1 V to 24 V Interleaved operation results in smaller, low cost input capacitor All-N-channel MOSFET design for low cost ±0.85% accuracy at 0°C to 70°C Soft start, thermal overload, current-limit protection 10 μA shutdown supply current Internal linear
regulator Lossless RDSON current-limit sensing Reverse current protection during soft start for handling precharged outputs Independent Power OK outputs Voltage tracking for sequencing or DDR termination Available in 5 mm × 5 mm, 32-lead LFCSP
VIN = 12V 180µF
TYPICAL APPLICATION CIRCUIT
180µF 1µF PV IN TRK1 TRK2 VREG BST1 DH1 EN1 EN2
BST2 DH2
0.47µF IRLR7807Z 1.2V, 6A
0.47µF IRLR7807Z 1.8V, 8A
ADP1829
2.2µH SW1 2kΩ SW2 CSL2 DL2 PGND2 PGND1 FB1 390pF 2kΩ FB2 390pF 1kΩ IRFR3709Z 2kΩ 2.2µH
560µF 2kΩ IRFR3709Z
CSL1 DL1
560µF 2kΩ
COMP2
COMP1 FREQ 4.53kΩ 3900pF LDOSD GND SYNC
3900pF 4.53kΩ
APPLICATIONS
Telecommunications and networking systems Medical imaging systems Base station power Set-top boxes Printers DDR termination
Figure 1.
GENERAL DESCRIPTION
The ADP1829 is a versatile, dual, interleaved, synchronous PWM buck controller that generates two independent output rails from an input of 3.0 V to 18 V, with power input voltage ranging from 1.0 V to 24 V. Each controller can ...