MAX16935RATEB/V 데이터 시트보기 (PDF) - Maxim Integrated
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MAX16935RATEB/V Datasheet PDF : 17 Pages
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MAX16935/MAX16939
36V, 3.5A, 2.2MHz Step-Down Converters
with 28µA Quiescent Current
Pin Configurations
TOP VIEW
12 11 10 9
LX 13
PGND 14
PGOOD 15
SYNCOUT 16
MAX16935
MAX16939
+
EP
1
2
3
4
8 BST
7 AGND
6 BIAS
5 COMP
TQFN
16 15 14 13 12 11 10 9
MAX16935
MAX16939
EP
+
12345678
TSSOP
Pin Descriptions
PIN
TQFN
TSSOP
NAME
16
1
SYNCOUT
1
2
FSYNC
2
3
FOSC
3
4
OUT
4
5
FB
5
6
COMP
6
7
BIAS
7
8
AGND
8
9
BST
9
10
EN
FUNCTION
Open-Drain Clock Output. SYNCOUT outputs 180N out-of-phase signal relative to the
internal oscillator. Connect to OUT with a resistor between 100I and 1kW for 2MHz
operation. For low frequency operation, use a resistor between 1kW and 10kW.
Synchronization Input. The device synchronizes to an external signal applied to
FSYNC. Connect FSYNC to AGND to enable skip mode operation. Connect to BIAS or
to an external clock to enable fixed-frequency forced PWM mode operation.
Resistor-Programmable Switching Frequency Setting Control Input. Connect a resistor
from FOSC to AGND to set the switching frequency.
Switching Regulator Output. OUT also provides power to the internal circuitry when
the output voltage of the converter is set between 3V to 5V during standby mode.
Feedback Input. Connect an external resistive divider from OUT to FB and AGND to
set the output voltage. Connect to BIAS to set the output voltage to 5V.
Error Amplifier Output. Connect an RC network from COMP to AGND for stable
operation. See the Compensation Network section for more information.
Linear Regulator Output. BIAS powers up the internal circuitry. Bypass with a 1FF
capacitor to ground.
Analog Ground
High-Side Driver Supply. Connect a 0.1FF capacitor between LX and BST for
proper operation.
SUP Voltage Compatible Enable Input. Drive EN low to disable the device. Drive EN
high to enable the device.
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