ADP1621(RevB) データシートの表示（PDF） - Analog Devices
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ADP1621 Datasheet PDF : 32 Pages
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ADP1621
Data Sheet
Parameter
GATE DRIVER
GATE Rise Time9
GATE Fall Time9
Symbol
tR
tF
Conditions
CGATE = 3.3 nF
CGATE = 3.3 nF
Min Typ
17
13
Max Unit
ns
ns
1 The maximum input voltage is the shunt regulation voltage, which is typically 5.5 V and can range from 5.3 V to 6.0 V over the specified temperature range.
2 The ADP1621 is tested in a feedback servo loop, which servos VFB to the internal reference voltage. The voltage change in FB is measured while VIN is changed from
2.9 V to 5 V. The line regulation is calculated by (∆VFB/VFB) × 100%/∆VIN.
3 The ADP1621 is tested in a feedback servo loop, which servos VFB to the internal reference voltage, and VCOMP is forced from 1.4 V to 1.5 V. The VCOMP range is
(1.0 V ≤ VCOMP ≤ 2.0 V).
4 The peak slope-compensation current at the CS pin is typically 70 µA, and effectively clamped at 116 mV. Thus, RS should not exceed 1.6 kΩ (116 mV/70 µA).
5 Guaranteed by design for thermal shutdown. When the thermal junction temperature of the ADP1621 reaches approximately 150°C, the ADP1621 goes into thermal
shutdown and the GATE voltage is pulled low. When the junction temperature drops below about 140°C, the soft start sequence is initiated and the ADP1621 resumes
normal operation.
6 fOSC is the natural oscillation frequency, fSYNC is the synchronization frequency, and fSW is the switching frequency. If synchronization is used, then fSW = fSYNC; otherwise, fSW = fOSC.
7 Guaranteed by design and bench characterization.
8 To ensure proper synchronization operation, set the synchronization frequency, fSYNC, to 1.2× of the free-running frequency, fOSC. Although the switching frequency can
be synchronized to as high as 1.8 MHz, the peak slope-compensation current decreases at higher synchronization frequencies. It is recommended that the maximum
fSYNC be less than 1.4× of fOSC and should not exceed 1.8 MHz. The slope-compensation resistor, RS, should be chosen for the synchronization frequency (see the Slope
Compensation section in the Application Information: Boost Converter section).
9 GATE rise and fall times are measured from 10% to 90% levels.
Rev. B | Page 4 of 32
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