APW8871 Datasheet, PDF (7/27 Pages) Anpec Electronics Coropration – DDR4 TOTAL POWER SOLUTION (VPP/VDDQ/VTT) SYNCHRONOUS DC/DC CONVERTER for NB/MB

APW8871
Electrical Characteristics
Ref er to the typical applic ation cir cuits . These s pecif ications apply over V =V =5V, V =19V and T = -40 ~ 85^oC, unless
VCC BOO T
IN
A
otherw ise specified. Typical values are at T =25oC.
A
Symbol
Parameter
Test Conditions
APW8871
Unit
Min Typ Max
VPP PWM CONTROLLER
VVREF_PP
IFB2
VPP Reference Voltage
VFB2 Input Current
Reference Voltage Accuracy
FS W
T_{SS_VPP}
T_{OFF (MIN)}
TON(MIN)
Operating Frequency
Internal Soft Start Time
Minimum off time
Minimum on time
Zero-Crossing Threshold
VFB2 =2V
Over All Temperature Range
Load and Line Regulation,
IVPP< 0.6A, 3V < PVCC< 5.5V
VCC=4.5V~5.5V
S5 is High to V_VPP Regulation
Over All Temperature and V CC
-
0.6
-
V
-50
-
50
nA
-0.5
-
0.5
%
-0.5
-
0.5
%
850 1000 1150 kHz
0.1 0.2 0.3 ms
200 300 400 ns
80 110 140 ns
-5 0.5
5
mV
LX2 Discharge Resistance
VPP POWER MOSFET
VS3 = VS5 = 0V
-
-
100
Ω
RON_HS_PP
High-Side P-MOSFET
Resistance
-
-
220 mΩ
RON_LS_PP
Low-Side N-MOSFET
Resistance
-
-
200 mΩ
T_D
Dead Time
VPP PROTECTIONS
Internal Design Spec.
2
3
5
ns
VOCL Current Limit Threshold
Sensing Valley Current
2.5
3
3.5
A
V NOCL
Negative Current
Threshold
Limit
-
-0.6
-
A
VPP OVP Trip Threshold
VPP OVP Debounce Delay
VPP UVP Trip Threshold
VVPP Rising
V_VPP Rising, DV=10mV
VVPP Falling
120 125 130
%
-
2
-
µs
55
60
65
%
VPP UVP Debounce
-
2
-
µs
VPP UVP Enable Delay
-
0.7
-
ms
POK
VPOK POK Threshold
POK in from Lower (POK Goes High)
POK Out from Normal (POK Goes Low)
87
90
93
%
120 125 130
%
I_POK
POK Leakage Current
POK Output Low Voltage
POK Enable Delay Time
V_POK=5V
VCC=5V, IPOK_SINK=4mA
S5 High to POK High
-
0.1
1.0
µA
-
0.5
1
V
-
0.7
-
ms
POK Delay Time
Delay for POK Rise Up/ Fall Down
-
20
-
µs
BOOTSTRAP DIODE
V_F
Forward Voltage
IF
Reverse Leakage
V_VCC – V_BOOT=5V, I_F = 10mA, T_A = 25 ^oC
VBOOT = 30V, VLX = 25V, VVCC=5V, TA = 25 ^oC
-
0.15 0.25
V
-
0.2
0.5
µA
C opyright © ANPEC Electronics C orp.
7
Rev. A.1 - Sep., 2015
www.anpec.com.tw