ADP5042 Analog Devices, ADP5042 Datasheet - Page 8

• Manufacturer Part Number: ADP5042
• Description: Micro PMU with 0.8 A Buck, Two 300 mA LDOs, Supervisory, Watchdog and Manual Reset
• Manufacturer: Analog Devices

ADP5042
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 8. Preliminary Pin Function Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
TP
Mnemonic
NC
VOUT3
VIN3
EN3
nRSTO
AVIN
VIN1
SW
PGND
EN1
VOUT1
WDI2
VIN2
VOUT2
WSTAT
EN2
MODE
WMOD
WDI1
MR
AGND
Description
Do not connect to this pin.
LDO2 Output Voltage and Sensing Input.
LDO2 Input Supply (1.7 V to 5.5 V).
Enable LDO2. EN3 = high: turn on LDO2; EN3 = low: turn off LDO2.
Open-Drain Reset Output, Active Low.
Regulators Housekeeping and Supervisory Input Supply (2.3 V to 5.5 V).
Buck Input Supply (2.3 V to 5.5 V).
Buck Switching Node.
Dedicated Power Ground for Buck Regulator.
Enable Buck. EN1 = high: turn on buck; EN1 = low: turn off buck.
Buck Sensing Node.
Watchdog 2 (Long Timeout) Refresh Input from Processor. Can be disabled only by factory option.
LDO1 Input Supply (1.7 V to 5.5 V).
LDO1 Output Voltage and Sensing Input.
Open-Drain Watchdog Timeout Status. WSTAT = high: Watchdog 1 timeout or power-on reset; WSTAT = low:
Watchdog 2 timeout. Auto cleared after one second.
Enable LDO1. EN2 = high: turn on LDO1. EN2 = low: turn off LDO1.
Buck Mode. MODE = high: buck regulator operates in fixed PWM mode; MODE = low: buck regulator operates
in pulse skipping mode (PSM) at light load and in constant PWM at higher load.
Watchdog Mode. WMOD = low: Watchdog 1 normal mode; WMOD = high: Watchdog 1 cannot be disabled by
a three-state condition applied on WDI1.
Watchdog 1 Refresh Input from Processor. If WDI1 is in high-Z and WMOD is low, Watchdog 1 is disabled.
Manual Reset Input, Active Low.
Analog Ground (TP = Thermal Pad). Exposed pad should be connected to AGND.
Figure 2. Pin Configuration—View from Top of the Die
NOTES
1. EXPOSED PAD SHOULD BE CONNECTED TO AGND.
2. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN.
nRSTO
VOUT3
VIN3
EN3
NC
1
2
3
4
5
Rev. A | Page 8 of 32
(Not to Scale)
ADP5042
TOP VIEW
15 WSTAT
14
13
12
11 VOUT1
VIN2
WDI2
VOUT2
Data Sheet