MIC24045 Datasheet, PDF (2/46 Pages) Microchip Technology – I2C Programmable, 4.5V-19V Input, 5A Step-Down Converter

MIC24045
Package Types
MIC24045
3 x 3 FQFN*
(Top View)
20 19 18 17 16
V_IN 1
V_{IN 2}
P_GND 3
P_{GND 4}
LX 5
21 V_{IN_}EP
22 P_{GND_}EP
23 LX_EP
678 9
15 COMP
14 _AGND
13 P_GND
12 SDA
11 SCL
10
* Includes Exposed Thermal Pad (EP); see Table 3-1.
Functional Block Diagram
ADR0
ADR1
SCL
SDA
OUTSNS
PG
EN
VINLDO
VDDA
VDDP BST
VIN
2 µA
Linear
Regulator
10O
Reference and
DAC
1.21V
Enable
Comparator
REFDAC
UVLO _VDDA
VOUT<7:0> POR
ThSD,
ThWrn
Thermal
Shutdown and
Warning
I²C
Interface
and
Registers
Ilim<1:0>
Freq<2:0>
SS<1:0>
VOUT RANGE
Soft-
Start
R2
UVLO
UVLO
Control Logic/
Valley Current Mode
Modulator
ISENSE
Current
Limit
DLY
Power-Good
Comparator
REFDAC
R1
Gm
Error
Amplifier
CLK SLOPE
Oscillator
and
Slope
Compensation
High-Side
Current
Limit
VIN_EP
Gate
Drive
Low-Side
ISense
Low-Side
Current
Limit
HS
LX
LX_EP
LS
PGND
PGND_EP
VIN
OUTSNS
AGND
COMP
DS20005568A-page 2
 2016 Microchip Technology Inc.