MAX16903 Datasheet, PDF (11/13 Pages) Maxim Integrated Products – 2.1MHz, High-Voltage, 1A Mini-Buck Converter Thermal Shutdown Protection

2.1MHz, High-Voltage, 1A Mini-Buck Converter
4) Keep the high current paths short especially at the
ground terminals. The practice is essential for stable
jitter-free operation.
5) Connect the PGND and GND together preferably at
the return terminal of the output capacitor. Do not
connect them anywhere else.
6) Keep the power traces and load connections short.
This practice is essential for high efficiency. Use
thick copper PCB to enhance full load efficiency and
power dissipation capability.
7) Route high-speed switching nodes away from sensi-
tive analog areas. Use internal PCB layers as PGND
to act as EMI shields to keep radiated noise away
from the device and analog bypass capacitor.
ESD Protection
The ESD tolerance for the MAX16903 is rated for Human
Body Model and Machine Model. The Human Body
Model discharge components are C_S = 100pF and R_D
= 1.5kΩ (Figure 1). The Machine Model discharge com-
ponents are C_S = 200pF and R_D = 0Ω (Figure 2).
R_D
1MΩ
1.5kΩ
HIGH-
VOLTAGE
DC
SOURCE
CHARGE-CURRENT-
LIMIT RESISTOR
C_S
100pF
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
DEVICE
UNDER
TEST
R_D
0Ω
HIGH-
VOLTAGE
DC
SOURCE
CHARGE-CURRENT-
LIMIT RESISTOR
C_S
200pF
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
DEVICE
UNDER
TEST
Figure 1. Human Body ESD Test Circuit
Figure 2. Machine Model ESD Test Circuit
Selector Guide
PART
OUTPUT VOLTAGE
(V)
PIN-PACKAGE
MAX16903RATB50/V+
5
10 TDFN-EP*
(3mm x 3mm x 0.75mm)
MAX16903RAUE50/V+
5
16 TSSOP-EP*
(5mm x 4.4mm)
MAX16903SATB50/V+
5
10 TDFN-EP*
(3mm x 3mm x 0.75mm)
MAX16903SAUE50/V+
5
16 TSSOP-EP*
(5mm x 4.4mm)
MAX16903RATB33/V+
3.3
10 TDFN-EP*
(3mm x 3mm x 0.75mm)
MAX16903RAUE33/V+
3.3
16 TSSOP-EP*
(5mm x 4.4mm)
MAX16903SATB33/V+
3.3
10 TDFN-EP*
(3mm x 3mm x 0.75mm)
MAX16903SAUE33/V+
3.3
16 TSSOP-EP*
(5mm x 4.4mm)
Note: All devices operate over the -40°C to +125°C automotive temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
/V denotes an automotive qualified part.
*EP = Exposed pad.
SPREAD-SPECTRUM
SWITCHING FREQUENCY
⎯
⎯
Yes
Yes
⎯
⎯
Yes
Yes
TOP
MARK
AVU
⎯
AVW
⎯
AVT
⎯
AVV
⎯
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