ISL6217A Datasheet, PDF (19/20 Pages) Intersil Corporation – Precision Multi-Phase Buck PWM Controller for Intel, Mobile Voltage Positioning IMVP-IV™ and IMVP-IV+™

ISL6217A
P_UPPER
=
I_O2
× r_DS(ON) × V_OUT
V_IN
+
I_O
× V_IN × t_SW
2
× F_SW
(EQ. 11)
Typical Application - 2 Phase Converter
Using ISL6217A PWM Controller - 38 Lead
TSSOP
Figure 14 shows the ISL6217A, Synchronous Buck
Converter circuit used to provide the CORE voltage
regulation for the Intel IMVP-IV™ and IMVP-IV+™
application. The circuit uses 2 channels for delivering up to
25A steady state current, and has a 250kHz channel
switching frequency. This circuit also switches to single
channel operation for Deep and Deeper Sleep modes of
operation. For thermal compensation, PTC resistors are
used as sense resistors. The Output capacitance is less than
3mΩ of ESR, and are (4) 220µF, 4V Sp-Cap parts in parallel
with (35) high frequency, 10µF ceramic capacitors.
+5VDC
+5VDC
98.8K_1%
1µF
0.027µF
BAT54
243K_1%
VR_ON
DPRSLPVR
DPSLP#
VID
MVP4_PGOOD
3.40K_1%
2200pF
13K_1%
No-Pop
No-Pop
1.20K_1%
VDD
DACOUT
VBAT
ISEN1
DSV
PHASE1
FSET
UG1
PWRCH
BOOT1
EN
VSSP1
DRSEN
LG1
DSEN#
VDDP
VID0 ^ISL6217A LG2
VID1 ^TSSOP VSSP2
VID2
BOOT2
VID3
UG2
VID4
PHASE2
VID5
ISEN2
PGOOD
VSEN
EA+
DRSV
COMP
STV
FB
OCSET
SOFT
VSS
0.012µF
1800pF
3.57K_1%
36.5K_1%
30.1K_1%
49.9K_1%
560pF
Vbattery
1 x IRF7811W
4 x 10 µF
10_1%
1.5K_1%PTC
0.8µH
ETQ-P3H0R8BA
0.33µF
2 x SI4404DY
1R5_5%
4.7µF
1R5_5%
4 x 10 µF
0.33µF
10_1%
BAT54
1.5K_1%PTC
1 x IRF7811W
0.8µH
+Vcc_core
ETQ-P3H0R8BA
2 x SI4404DY
4 x 220µF &
35 x 10µF
Analog GND
Power GND
FIGURE 14. TYPICAL APPLICATION CIRCUIT FOR THE IMVP-IV™ AND IMVP-IV+™ CORE VOLTAGE REGULATOR
19
FN9107.3
June 30, 2005