isl88550a Intersil Corporation, isl88550a Datasheet - Page 3

• Manufacturer Part Number: isl88550a
• Description: Synchronous Step Down Controller With Sourcing And Sinking Ldo Regulator
• Manufacturer: Intersil Corporation

Electrical Specifications
Absolute Maximum Ratings
VIN to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +25V
VDD, AVDD, VTTI to GND. . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V
SHDNA#, REFIN to GND. . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V
SS, POK1, POK2, SKIP#, ILIM, FB to GND . . . . . . . . . . -0.3V to 6V
STBY#, T
OUT, VTTR to GND . . . . . . . . . . . . . . . . . . . . . -0.3V to AV
LGATE to PGND1 . . . . . . . . . . . . . . . . . . . . . . . -0.3V to V
UGATE to PHASE . . . . . . . . . . . . . . . . . . . . -0.3V to VBOOT + 0.3V
BOOT to PHASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 6V
BOOT to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +33V
VTT to GND. . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to VTTI + 0.3V
VTTS to GND. . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to AV
PGND1, PGND2 to GND . . . . . . . . . . . . . . . . . . . . . . -0.3V to +0.3V
REF Short Circuit to GND. . . . . . . . . . . . . . . . . . . . . . . . . Continuous
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
NOTES:
MAIN PWM CONTROLLER
V
V
Output Adjust Range
Output Voltage Accuracy (Note 5)
Soft-Start Ramp Time
ON-Time
Minimum, OFF-Time
V
V
Combined AV
Current
Combined AV
Current
AV
REFERENCE
Reference Voltage
Reference Load Regulation
REF Undervoltage Lockout
1. θ
2. For θ
3. Following are target specifications. Final limits may change as a result of characterization.
IN
DD
IN
IN
DD
Input Voltage Range
Quiescent Supply Current
Shutdown Supply Current
Tech Brief TB379.
, AV
JA
Undervoltage Lockout Threshold
is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See
DD
JC
ON
, the "case temp" location is the center of the exposed metal pad on the package underside. See Tech Brief TB379.
Input Voltage Range
, REF, UVP/OVP to GND. . . . . . . -0.3V to AV
DD
DD
PARAMETER
and V
and V
DD
DD
Quiescent Supply
Shutdown Supply
3
V
FB = SKIP# = OVP/UVP = GND. PGND1 = PGND2 = PHASE = GND, VTTS = VTT, t
+85°C, unless otherwise noted. Typical values are at T
IN
= +15V, V
FB = OUT
FB = GND
Rising edge of SHDNA# to full current limit
V
V
(Note 6)
(Note 6)
SHDNA# = STBY# = GND
All on (PWM, VTT, and VTTR on), V
STBY# = GND (only VTTR and PWM on),
V
SHDNA# = STBY# = GND
Rising edge of AV
Hysteresis
AV
I
V
Hysteresis
REF
DD
IN
OUT
FB
REF
DD
= 15V,
= 0.75V
= AV
= 0µA to 50µA
rising
= 1.5V
= 4.5V to 5.5V; I
DD
DD
DD
DD
DD
= SHDNA# = STBY# = BOOT = ILIM = 5V, OUT = REFIN = VTTI = 2.5V,
+ 0.3V
+ 0.3V
+ 0.3V
+ 0.3V
t
t
t
t
ON
ON
ON
ON
ISL88550A
CONDITIONS
DD
= GND (600kHz)
= REF (450kHz)
= OPEN (300kHz)
= AV
REF
DD
= 0µA to 130µA
(200kHz)
Thermal Information
Thermal Resistance
Operating Conditions
Junction Temperature Range. . . . . . . . . . . . . . . . . .-55°C to +150°C
Operating Temperature Range . . . . . . . . . . . . . . . . .-40°C to +85°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . -65°C + 150°C
Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below
TQFN Package (Notes 1, 2). . . . . . . . .
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
FB
= 0.75V
A
= +25°C (Note 4).
0.693
2.470
1.98
MIN
170
213
316
461
200
4.5
0.7
4.1
2
TYP
4.25
1.93
194
243
352
516
300
300
0.7
2.5
1.7
2.5
25
50
1
1
2
2
ON
θ
JA
= OPEN, T
(°C/W)
31
0.707
MAX
2.53
2.02
0.01
389
450
219
273
571
5.5
3.5
4.4
25
40
10
5
5
2
A
October 1, 2007
θ
= -40°C to
JC
FN6168.2
1.5
(°C/W)
UNIT
mA
mA
mV
mV
ms
µA
µA
µA
ns
ns
ns
ns
ns
V
V
V
V
V
V
V
V
V