L6725A STMicroelectronics, L6725A Datasheet - Page 12

• Manufacturer Part Number: L6725A
• Description: IC PWM CTLR VOLTAGE MODE SO-16N
• Manufacturer: STMicroelectronics

Specifications of L6725A

• Pwm Type: Voltage Mode
• Number Of Outputs: 1
• Frequency - Max: 550kHz
• Duty Cycle: 100%
• Voltage - Supply: 4.5 V ~ 18 V
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-SOIC (3.9mm Width)
• Frequency-max: 550kHz
• Output Voltage: 0.603 V
• Input Voltage: 1.8 V to 18 V
• Switching Frequency: 500 KHz
• Operating Temperature Range: - 40 C to + 125 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 100 %
• Package: SO16N
• For Use With: 497-5867 - EVAL BOARD 20A 250KHZ L6725497-5500 - EVAL BOARD FOR L6725
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Device description
5.5
Figure 4.
5.6
Figure 5.
12/32
Error amplifier
Soft start
When both V
the start-up phase takes place. Otherwise the SS pin is internally shorted to GND. At start-up, a
ramp is generated charging the external capacitor C
initial value for this current is 35µA and charges the capacitor up to 0.5V. After that it becomes
10µA until the final charge value of approximately 4V (see
Vss
Error amplifier reference
Soft-Start phase.
CC
and V
IN
are above their turn-ON thresholds (V
0.5V
SS
with an internal current generator. The
Figure
4V
IN
is monitored by the OCH pin)
5.).
1.25V
4.2V
Vcc
Vin
L6725 - L6725A
t
t