Datasheet

MAX16932/MAX16933
2.2MHz, 36V, Dual Buck
with 20µA Quiescent Current
9Maxim Integrated
Pin Description
Pin Configuration
PIN NAME DESCRIPTION
1 LX1
Inductor Connection for Buck 1. Connect LX1 to the switched side of the inductor. LX1 serves as the
lower supply rail for the DH1 high-side gate drive.
2 DL1 Low-Side Gate Drive Output for Buck 1. DL1 output voltage swings from V
PGND1
to V
BIAS
.
3 PGND1 Power Ground for Buck 1
4 CS1
Positive Current-Sense Input for Buck 1. Connect CS1 to the positive terminal of the current-sense
resistor. See the Current Limiting and Current-Sense Inputs and Current-Sense Measurement
sections.
5 OUT1
Output Sense and Negative Current-Sense Input for Buck 1. When using the internal preset 5V
feedback divider (FB1 = BIAS), the buck uses OUT1 to sense the output voltage. Connect OUT1
to the negative terminal of the current-sense resistor. See the Current Limiting and Current-Sense
Inputs and Current-Sense Measurement sections.
6 FB1
Feedback Input for Buck 1. Connect FB1 to BIAS for the 5V fixed output or to a resistive divider
between OUT1 and GND to adjust the output voltage between 1V and 10V. In adjustable mode,
FB1 regulates to 1V (typ). See the Setting the Output Voltage in Buck Converters section.
7 COMP1 Buck 1 Error-Amplifier Output. Connect an RC network to COMP1 to compensate buck 1.
8 BIAS
5V Internal Linear Regulator Output. Bypass BIAS to GND with a low-ESR ceramic capacitor of 6.8FF
minimum value. BIAS provides the power to the internal circuitry and external loads. See the Fixed
5V Linear Regulator (BIAS) section.
9 AGND Signal Ground for IC
MAX16932
MAX16933
TQFN
(5mm x 5mm)
TOP VIEW
26
27
25
24
10
9
11
DL1
CS1
OUT1
FB1
COMP1
12
LX1
PGND2 OUT2 FB2 DL2 COMP2 FOSC
12
EN2
4567
2021 19 17 16 15
EN1
BST1
PGOOD1
IN
EXTVCC
AGND
PGND1
CS2
3
18
28
8
DH1
EP
BIAS
+
BST2
23
13
PGOOD2
DH2
22
14
FSYNC
LX2