Renesas RTKA211803DE0000BU Manual

RTKA211803DE0000BU
The RAA211803 is an integrated 3.3V, 300mA buck
regulator with an ultra-low quiescent current (I
5.5µA. It supports a wide input voltage range from 7V
to 80V. The RAA211803 is offered in a TSOT23-5
package. The RTKA211803DE0000BU evaluation
board provides a quick and comprehensive platform
for evaluating the performance features of the
RAA211803 buck regulator.
The RTKA211803DE0000BU evaluation board
operates from a supply voltage of 7V to 80V
delivering a continuous load up to 300mA at 3.3V
output voltage.
Specifications
This board is configured and optimized for the
following operating conditions:
▪ Input voltage range: 7V to 80V
▪ Output voltage: 3.3V
▪ Up to 300mA output current capability
▪ Inductor current limit of 750mA (typical) peak
▪ Operating temperature range: -40°C to +125°C
J1
VIN
C
4.7µF
GND
J2
R16UZ0086EU0101 Rev.1.01
Dec 5, 2023
DC
1Meg
4
VIN
IN
SW
5
RAA211803
VSW
GND
Figure 1. RTKA211803DE0000BU Block Diagram
Features
) of
Q
▪ 7V to 80V input supply range
▪ Up to 300mA output current
▪ I = 5.5µA at 80V, at no load conditions, switching
Q
▪ I
= 4.5µA at 80V at no load and no switching
Q
conditions
▪ Minimum on-time of 75ns
▪ Fixed 3.3V V
,
▪ Variable frequency operation, frequency
programmed by external inductor (15µH to 33µH)
▪ Pre-bias start-up/Monotonic/ smooth start-up
▪ Total of four external components
▪ Protections: Overcurrent (OC) Limit, input
Undervoltage Lockout (UVLO), Over-Temperature
Protection (OTP), output Overvoltage Protection
(OVP)
▪ Accurate EN threshold
R2 EN
TP3
U1
3
EN
2
GND
1
VOUT
L
1
33µH
Evaluation Board Manual
OUT
2
C C
OUT1 OUT2
22µF 22µF
© 2023 Renesas Electronics
V = 3.3V
OUT
J3
GND
J4
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