
E
D
A
A1
A3
D2
E2
NXL
e
NXb
MILLIMETERS
MIN 
NOM MAX 
0.80 
0.85 
0.00 
0.02 
-- 
0.20ref 
0.20 
0.25 
4.00 
2.70 
2.80 
4.00 
2.70 
2.80 
0.50 
0.30 
0.40 
0.08mm(.003")
0.10mm(.004")
E2/2
D2/2
1
2
Top View
Side View
Bottom View
1
2
Controlling Dimensions: Millimeters
PICOR
1004-X
(LOT#)
DATE CODE
DIM 
A 
A1 
A3 
NXb 
D 
D2 
E 
E2 
e 
NXL 
MIN 
 .031 
.000 
--  
.008 
.106 
.106 
.012 
NOM MAX
.033 
.001 
.008 ref 
.010 
.157
.110 
.157
.110 
.020
.016 
.90 
0.05 
--  
0.30 
2.90 
2.90 
0.50 
.035
.002
--
.012
.114
.114
.020
INCHES
Picor Corporation  picorpower.com
PI1004 Data Sheet  Rev. 2.5  
Page 15 of 16
Package Description
Layout Guidelines
Good layout technique is required for systems that
combine sensitive amplifiers and switching
converters. Extra care must be taken to provide high
frequency decoupling and to avoid introducing noise
at sensitive nodes.
 The capacitors for V
CC
 decoupling and Soft Start 
should provide low impedance paths to each pin 
and be referenced to SGND close to the PI1004.
 The connections from load V
SS 
to SGND and the 
load V
CC
 to EAIP form an output voltage sense 
pair and should be routed in parallel to avoid 
noise pick-up. If the layout allows PI1004 return 
current to flow through the load V
SS
 to SGND 
connection, trace resistance must be considered 
to avoid an excessive offset voltage within the trace.
 The PI1004 EA integrator capacitor should be 
routed in a short loop to minimize noise pick-up.
 R
G
 and R
OFFSET
 should be tied to SGND near the 
PI1004 to avoid noise pickup.
PARAMETER
Maximum Junction-to-Ambient 
2
Maximum Junction-to-Case
SYMBOL
θ
JA
θ
JC
TYPICAL
46
2
UNIT
°C/W
°C/W
Thermal Resistance Ratings
PART NUMBER
PI1004-1-QAHG
PI1004-2-QAHG
PACKAGE
BRANDING
1004-1
1004-2
TEMP. RANGE
-40°C to 125°C
-40°C to 125°C
TRANSPORT MEDIA
T&R
T&R
24 lead (4mm x 4mm) QFN
24 lead (4mm  x 4mm) QFN
Ordering Information
Note 2:
 In accordance with JEDEC JESD 51-5
Note 3:
 This product is MSL classified at the peak soldering reflow temperature listed in the Absolute Maximum Rating
section to meet the lead free requirements of the joint IPC
and JEDEC
standard J-STD-020C.