Part Review and Datasheet Analysis

Thought for 1 min 23 sec

AP63357QZV-7 part review

I reviewed the part metadata already present, confirmed a datasheet URL is already set, scanned the datasheet at PDF, and cross-checked the current symbol and footprint.

1) Current part-project information Project metadata

Table

Field	Current value	Datasheet cross-check
Manufacturer	Diodes	Matches
MPN	AP63357QZV-7	Matches
Description	Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 3.5A 13-PowerVFDFN	Consistent
Datasheet URL	Set	Present already, so no update was needed
Package in description	13-PowerVFDFN	Datasheet gives V-DFN3020-13/SWP (Type A1), 3 mm x 2 mm, wettable flanks

Current symbol terminals

Table

Terminal	Pin number	Current pin type	Datasheet function
VIN	1	Unspecified	Power input
EN	2	Unspecified	Enable / UVLO input
FB	3	Unspecified	Feedback input
COMP	4	Unspecified	Compensation node
PG	5	Unspecified	Open-drain power-good output
BST	6	Unspecified	Bootstrap supply
NC	7	Unspecified	No connect
GND	8	Unspecified	Power ground
SW	9	Unspecified	Switching node

Current footprint findings

Table

Item	Current footprint
Footprint asset	`AP63357QZV7.kicad_mod`
3D model	`AP63357QZV-7.stp` present
Functional pad count	9 pads
Functional pad names	VIN, EN, FB, COMP, PG, BST, NC, GND, SW
Footprint package text	`V-DFN3020-13/SWP (Type A1)`

2) Datasheet summary Core part metadata

Table

Parameter	Value
Device	AP63357Q
Function	Automotive-compliant synchronous buck converter
Input range	3.8 V to 32 V
Output current	3.5 A continuous
Reference voltage	0.8 V ±1%
Switching frequency	450 kHz typ
Package	V-DFN3020-13/SWP (Type A1)
Body size	3.00 mm x 2.00 mm
Feature note	Wettable flanks

Special features

Table

Feature	Datasheet detail
Light-load mode	PFM/PWM
EMI reduction	Frequency Spread Spectrum
Low IQ	22 µA typ
Enable threshold	1.18 V typ
Soft-start	4 ms typ
PG output	Open-drain with 5 MΩ internal pull-up
Protection	UVLO, UVP, cycle-by-cycle peak current limit, thermal shutdown
Low-dropout mode	Supported

Absolute maximum ratings

Table

Parameter	Rating
VIN	-0.3 V to +35.0 V DC, -0.3 V to +40.0 V for 400 ms
EN	-0.3 V to +35.0 V
FB	-0.3 V to +6.0 V
COMP	-0.3 V to +6.0 V
PG	-0.3 V to +6.0 V
BST	VSW - 0.3 V to VSW + 6.0 V
SW	-0.3 V to VIN + 0.3 V DC, -2.5 V to VIN + 2.0 V for 20 ns
Storage temp	-65 °C to +150 °C
Junction temp	+170 °C
Lead temp	+260 °C
ESD HBM	±2000 V
ESD CDM	±1000 V

Recommended operating conditions

Table

Parameter	Min	Max
VIN	3.8 V	32 V
VOUT	0.8 V	VIN
Ambient temperature	-40 °C	+125 °C
Junction temperature	-40 °C	+150 °C

Key electrical characteristics

Table

Parameter	Min	Typ	Max
Shutdown current	-	0.6 µA	-
Quiescent current	-	22 µA	-
POR rising threshold	3.3 V	3.5 V	3.6 V
UVLO falling threshold	-	3.08 V	-
High-side MOSFET RDS(on)	-	74 mΩ	-
Low-side MOSFET RDS(on)	-	40 mΩ	-
HS peak current limit	4.0 A	5.0 A	6.0 A
LS valley current limit	3.2 A	4.2 A	5.2 A
Oscillator frequency	400 kHz	450 kHz	500 kHz
Minimum on-time	-	100 ns	-
Feedback voltage	0.792 V	0.800 V	0.808 V
EN high threshold	1.15 V	1.18 V	1.21 V
EN low threshold	1.02 V	1.08 V	1.14 V
EN input current at 1.5 V	-	5.5 µA	-
EN input current at 1.0 V	1.0 µA	1.5 µA	2.0 µA
Soft-start time	-	4 ms	-
Thermal shutdown	-	+170 °C	-
Thermal shutdown hysteresis	-	+25 °C	-

Pin descriptions

Table

Pin	Number	Description
VIN	1	Power input for IC and MOSFETs; bypass to GND with suitable capacitor
EN	2	Enable input; high = on, low = off; can be tied to VIN or left floating; used for UVLO programming
FB	3	Feedback sensing terminal for output divider
COMP	4	Compensation node; tie to GND for internal compensation or use external RC network
PG	5	Open-drain power-good output with internal 5 MΩ pull-up
BST	6	Bootstrap supply for high-side gate driver; use 100 nF from BST to SW
NC	7	No internal connection; may be tied to another pin or left floating
GND	8	Power ground
SW	9	Switching node; connect output LC filter from here to load

Package dimensions

Table

Dimension	Value
D	2.00 mm BSC
E	3.00 mm BSC
A	0.80 mm to 0.90 mm
A1	0.00 mm to 0.05 mm
b	0.15 mm to 0.25 mm
e	0.45 mm BSC
L	0.35 mm to 0.45 mm
L1	0.55 mm to 0.65 mm
L2	1.475 mm to 1.575 mm

Suggested pad layout from datasheet

Table

Layout parameter	Value
C	0.45 mm
G	0.175 mm
X	0.60 mm
X1	0.80 mm
X2	0.30 mm
X3	2.30 mm
Y	0.30 mm
Y1	1.450 mm
Y2	1.725 mm
Y3	2.825 mm

3) Symbol and footprint cross-check What matches

Table

Check	Result	Notes
MPN	Pass	AP63357QZV-7 matches datasheet ordering info
Package family	Pass	Footprint text matches V-DFN3020-13/SWP (Type A1)
Functional pin count	Pass	Datasheet functional pins are 9, and project symbol/footprint both implement 9
Pin-number mapping	Pass	1 VIN, 2 EN, 3 FB, 4 COMP, 5 PG, 6 BST, 7 NC, 8 GND, 9 SW all match
Pad geometry	Pass	Current footprint pad sizes align with datasheet suggested values: 0.30 x 0.60 mm, 0.80 x 1.450 mm, 0.30 x 1.725 mm
3D asset presence	Pass	STEP model exists

Issues and risk flags

Table

Severity	Finding	Why it matters
Medium	All symbol terminals are set to Unspecified pin type	This weakens ERC quality and can hide connection mistakes, especially for PG, EN, VIN, GND, and SW
Low	Package naming can look inconsistent: project description says 13-PowerVFDFN, datasheet says V-DFN3020-13/SWP	This could confuse part selection or review, even though the footprint itself appears correct
Low	No richer per-pin descriptions are encoded in the current symbol	Not a manufacturing issue, but it makes reuse and review weaker

Important clarification

Table

Item	Conclusion
“13-pin package” vs 9 implemented pads	Not necessarily a defect. The datasheet’s functional pin table contains 9 electrical pins, and the current symbol/footprint implements those 9 correctly. The package designation includes the SWP/wettable-flank package style, so I do not see evidence of a missing electrical pad from the current data.

4) Bottom line

Table

Area	Verdict
Datasheet availability	Good
Metadata completeness	Good, but package naming could be normalized
Symbol pin mapping	Correct
Footprint/package match	Correct from the available footprint data
Manufacturing risk	No obvious pad-count or pin-map issue found
Main improvement needed	Assign correct pin electrical types and add fuller symbol metadata

Recommended fixes

Table

Terminal	Recommended pin type
VIN	Power In
EN	Input
FB	Input
COMP	Passive or Input
PG	Output
BST	Power In or Passive
NC	Not Connected
GND	Ground
SW	Power Out

If you want, I can turn this into a compact part QA checklist file for this part project.

Set pin types

Review ERC issues

Normalize package name

Export QA report

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