L5996 Datasheet, PDF (2/9 Pages) STMicroelectronics – 5 BIT DYNAMIC DAC CONTROLLER FOR MOBILE CPU

L5996
PIN CONNECTION
ENABLE
VIN
REG5
V5SW
DISPROT
SSTART
HRSNS
LRSNS
32 31 30 29 28 27 26 25
1
24
2
23
3
22
4
21
5
20
6
19
7
18
8
17
9 10 11 12 13 14 15 16
VID4
VID3
VID2
VID1
VID0
ICURLIM
OSC
FREQ
D98IN998
BLOCK DIAGRAM
DESCRIPTION (Continued)
ence, digitally trimmed, assures the selected out-
put voltage to within +/-1% over temperature and
battery voltage variations.
Thanks to the remote sensing inputs and to the
window comparator system, embedded in the er-
ror summing structure, the device provides excel-
lent load transient performance. The high peak
current gate drive affords to have fast switching
to the external power mos, performing an high ef-
ficiency. A complete power management include
on board a programmable power-up sequencing,
power good signal, skip mode operation and un-
dervoltege detection. The L5996 assures a fast
protection against load overvoltage and load
overcurrent. Linear regulator on-board is avail-
able with an output voltage of 2.5V (+/-2%) and a
current capability of 150mA, useful for CPU
CLOCK BUS.
REG5
Cboot
Rsense
L
C
Load
VFB 9
LRSNS 8
HRSNS 7
10
COMP
RSTRAP 29
HSTRAP 28
VIN
HGATE 27
HSRC 26
RGATE 30
31
PWRGND
SNSGND
12
16
VSS
CSOFT
SSTART VID0 VID1 VID2 VID3 VID4
6
20 21 22 23 24
V_IN2.5
13
V_IN3.3V
SLOPE
+
-
- ERROR
SUMMING
+
+
-
WINDOW
COMP
PROGRAMMABLE
BANDGAP &
REFERENCE
SOFT
START
14
2.5V
LIN.
REG.
15
V_O2.5
VBG
VCPUCLK
VPROG
HRSNS
OVER CURRENT
COMPARATOR
LRSNS
INTERNAL SUPPLY
11 VPROG
Hside
Lside
CONTROL
LOGIC
OSCILLATOR
and
SYNC
+
-
ZERO CROSSING
COMPARATOR
+
-
PULSE SKIPPING
COMPARATOR
+
-
OVER/UNDER VOLTAGE
COMPARATOR
LINEAR
REGULATOR
VPROG
POWER
MANAGEMENT
3 REG5
C5
4 V5SW
2 VIN
Vdc
5.5V to 25V
32
PWGOOD
1
ENABLE
18
17
19
25
5
5V
OSC
FREQ
ICURLIM
NOSKIP DISPROT
D98IN999
ABSOLUTE MAXIMUM RATINGS
Symbol
T_j
T_stg
Parameter
VIN to PWRGND
PWRGND to VSS
VREFS to PWRGND
HSTRAP, HGATE to PWRGND
RSTRAP, RGATE to PWRGND
EABLE, FREQ, OSC, COMP, VFB, HRSNS, LRSNS
VID0-3, NOSKIP
Junction Temperature Range
Storage Temperature Range
Value
Unit
-0.5 to 27
V
±0.5
V
5
V
-0.5V to VIN+14V
-0.5V to 14V
5
V
7
V
-40 to 150
°C
-55 to 150
°C
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