R2J20701NP_08 RENESAS [Renesas Technology Corp], R2J20701NP_08 Datasheet - Page 11

• Manufacturer Part Number: R2J20701NP_08
• Description: Peak Current Mode Synchronous Buck Controller with Power MOS FETs
• Manufacturer: RENESAS [Renesas Technology Corp]

R2J20701NP
Application Example
Start-up Settings
Case 1)
Case 2)
REJ03G1459-0400 Rev.4.00 Jun 30, 2008
Page 11 of 27
R3
R4
R
C
Standalone or master chip in parallel operation
With the RC network on the TRK-SS pin, the voltage on the pin should ramp up slowly.
Coincident tracking
The TRS-SS signal for channel two is the voltage from Vout1 after division by a resistor network. Vout1
must be greater than Vout2. Cross-talk is not generated between the channels.
R
C
voltage
Output
TRK-SS
TRK-SS
From Vout1
REG5
REG5
TRK-SS
Channel 1
Channel 2
REG5
FB
FB
SW
SW
ON/OFF
TRK-SS
Vout1
Vout2
Vout
R1
R2
R3
R4
TSS =
Vout1 (nominal) = 0.6 V
Vout2 (nominal) = 0.6 V
CR
Ln (1
Time
0.6 V / 5 V)
0.6 V
(R1 + R2) / R2
(R3 + R4) / R4
Vout1
Vout2
(s)