MAX16930 Datasheet, PDF (10/29 Pages) Maxim Integrated Products – 2MHz, 36V, Dual Buck with Preboost and 20μA Quiescent Current

MAX16930/MAX16931
2MHz, 36V, Dual Buck with Preboost and
20µA Quiescent Current
Pin Configuration
TOP VIEW
30 29 28 27 26 25 24 23 22 21
DH2 31
20 PGOOD2
BST2 32
19 PGND3
FSELBST 33
18 DL3
BSTON 34
17 TERM
EN2 35
EN1 36
MAX16930
MAX16931
16 CS3N
15 CS3P
EN3 37
14 INS
N.C. 38
13 FB3
BST1 39
+
DH1 40
12 PGOOD1
11 IN
1 2 3 4 5 6 7 8 9 10
TQFN
PIN
NAME
1
LX1
2
DL1
3
PGND1
4
CS1
5
OUT1
6
FB1
7
COMP1
8
BIAS
9
AGND
Maxim Integrated
Pin Description
DESCRIPTION
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.
Low-Side Gate Drive Output for Buck 1. DL1 output voltage swings from V_PGND1 to V_BIAS.
Power Ground for Buck 1
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.
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.
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.
Buck 1 Error-Amplifier Output. Connect an RC network to COMP1 to compensate buck 1.
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.
Signal Ground for IC
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