ADP1823 Datasheet, PDF (4/32 Pages) Analog Devices – Dual, Interleaved, Step-Down DC-to-DC Controller with Tracking

ADP1823
Parameter
OSCILLATOR
Oscillator Frequency
SYNC Synchronization Range
SYNC Minimum Input Pulse Width
CURRENT SENSE
CSL1, CSL2 Threshold Voltage
CSL1, CSL2 Output Current
Current Sense Blanking Period
GATE DRIVERS
DH1, DH2 Rise Time
DH1, DH2 Fall Time
DL1, DL2 Rise Time
DL1, DL2 Fall Time
DH to DL, DL to DH Dead Time
LOGIC THRESHOLDS
SYNC, FREQ, LDOSD Input High Voltage
SYNC, FREQ, LDOSD Input Low Voltage
SYNC, FREQ Input Leakage Current
LDOSD Pull-Down Resistance
EN1, EN2 Input High Voltage
EN1, EN2 Input Low Voltage
EN1, EN2 Current Source
EN1, EN2 Input Impedance to 5 V Zener
THERMAL SHUTDOWN
Thermal Shutdown Threshold²
Thermal Shutdown Hysteresis²
POWER GOOD
FB1, UV2 Overvoltage Threshold
FB1, UV2 Overvoltage Hysteresis
FB1, UV2 Undervoltage Threshold
FB1, UV2 Undervoltage Hysteresis
POK1, POK2 Propagation Delay
POK1, POK2 Off Leakage Current
POK1, POK2 Output Low Voltage
UV2 Input Bias Current
Conditions
SYNC = FREQ = GND (fSW = fOSC)
SYNC = GND, FREQ = VREG (fSW = fOSC)
FREQ = GND, SYNC = 600 kHz to 1.2 MHz¹ (fSW = fSYNC/2)
FREQ = VREG, SYNC = 1.2 MHz to 2 MHz¹ (fSW = fSYNC/2)
Relative to PGND
CSL1, CSL2 = PGND
CDH = 3 nF, VBST − VSW = 5 V
CDH = 3 nF, VBST − VSW = 5 V
CDL = 3 nF
CDL = 3 nF
SYNC, FREQ = 0 V to 5.5 V
IN = 2.9 V to 20 V
IN = 2.9 V to 20 V
EN1, EN2 = 0 V to 3.0 V
EN1, EN2 = 5.5 V to 20 V
VFB1, VUV2 rising
VFB1, VUV2 rising
VPOK1, VPOK2 = 5.5 V
IPOK1, IPOK2 = 10 mA
Min Typ Max Unit
240 300
480 600
300
600
370 kHz
720 kHz
600 kHz
1000 kHz
200 ns
−30 0
44 50
100
+30 mV
56 μA
ns
15
ns
10
ns
15
ns
10
ns
40
ns
2.2
100
2.0
−0.3 −0.6
100
V
0.4 V
1
μA
kΩ
V
0.8 V
−1.5 μA
kΩ
145
°C
15
°C
750
mV
50
mV
550
mV
50
mV
8
μs
1
μA
150 500 mV
10
100 nA
1 _{SYNC input frequency is 2× single channel switching frequency. The SYNC frequency is divided by 2 and the separate phases were used to clock the controllers.}
2 _{Guaranteed by design and not subject to production test.}
Rev. A | Page 4 of 32