NCP1500DMR2G ON Semiconductor, NCP1500DMR2G Datasheet - Page 8

• Manufacturer Part Number: NCP1500DMR2G
• Description: IC CONV DUAL MODE PWM/LIN 8MICRO
• Manufacturer: ON Semiconductor

Specifications of NCP1500DMR2G

• Topology: Step-Down (Buck) (1), Linear (LDO) (1)
• Function: Any Function
• Number Of Outputs: 1
• Frequency - Switching: 270kHz ~ 639kHz
• Voltage/current - Output 1: 1V, 1.3V, 1.5V, 1.8V, -
• Voltage/current - Output 2: *
• W/led Driver: No
• W/supervisor: No
• W/sequencer: No
• Voltage - Supply: 2.7 V ~ 5.4 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: *
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Frequency-max: 630kHz
• Duty Cycle: 91%
• Pwm Type: Current Mode
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: NCP1500DMR2GOS; NCP1500DMR2GOS; NCP1500DMR2GOSTR

Over Voltage Protection
protects the output during the PWM mode. Normally, in
PWM mode, the output switch will conduct at the onset of
every synchronization pulse. The minimum output duty
cycle is 3%. The output voltage will rise at minimum duty
cycle and a light load or no load condition is present at the
output. If the output rises more than 5% of the programmed
−1.000 m
NCP1500 has an overvoltage protection circuit that
250.0 m
124.5 m
1.05150
1.05080
1.05010
Note:
−100 m
−500 m
3.6040
3.6000
3.5960
25.0 m
−10 m
150 m
20 m
10 m
4.00
1.75
175.00000
0.0
4.0
2.0
0.0
PP
− Patent Pending
V
Main FET Current
Inductor Current (F
Diode Current
V
V
Gate Voltage for Switching FET
IN
LX
O
(Set to 1 V)
181.33333
Figure 6. Waveforms of PFM Mode Operation During Over Voltage
sync
= 300 kHz)
187.66667
http://onsemi.com
194.00000
8
TIME (m)
voltage, an overvoltage comparator will trip. This signal will
reset the PWM latch and hold it in a reset condition until the
output voltage decays below its threshold. The output will
then be allowed to switch at the next synchronization pulse.
This type of operation is usually referred to as PFM or skip
mode operation.
during this condition:
The following figure is a simulation of the regulator
200.33333
206.66667
213.00000