ADP5043 Analog Devices, ADP5043 Datasheet - Page 8

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ADP5043

Manufacturer Part Number
ADP5043
Description
Micro-PMU with 0.8 A Buck, 300 mA LDO, Supervisory, Watchdog, and Manual Reset
Manufacturer
Analog Devices
Datasheet

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Part Number:
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ADP5043
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 8. 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
VOUT2
VIN2
EN2
nRSTO
AVIN
VIN1
SW
PGND
EN1
VOUT1
WDI2
GND
NC
WSTAT
GND
MODE
WMOD
WDI1
MR
AGND
Description
Do not connect to this pin. The pin should be left floating.
LDO Output Voltage and Sensing Input.
LDO Input Supply (1.7 V to 5.5 V).
Enable LDO. EN2 = high: turn on the LDO; EN2 = low: turn off the LDO.
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. This pin can be disabled only by a factory option.
Connect to the ground plane.
Do not connect to this pin. The pin should be left floating.
Open-Drain Watchdog Timeout Status. WSTAT = high: Watchdog 1 timeout or power-on reset; WSTAT = low:
Watchdog 2 timeout. Auto cleared after one second.
Connect to the ground plane.
Buck Mode. MODE = high: buck regulator operates in fixed PWM mode; MODE = low: (auto mode) buck
regulator operates in power save 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. WMOD has an internal 200 kΩ pull-down resistor connected to AGND.
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 = Exposed Thermal Pad). Exposed pad should be connected to AGND.
NOTES
1. EXPOSED PAD SHOULD BE CONNECTED TO AGND.
2. NC = NO CONNECT. DO NOT CONNECT TO THIS PIN.
THE PIN SHOULD BE LEFT FLOATING.
VOUT2
nRSTO
VIN2
EN2
NC
1
2
3
4
5
Figure 2. Pin Configuration
Rev. A | Page 8 of 32
(Not to Scale)
ADP5043
TOP VIEW
15 WSTAT
14
13
12
11 VOUT1
NC
GND
WDI2
Data Sheet

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