ISL62875 Datasheet, PDF (8/22 Pages) Intersil Corporation – PWM DC/DC Controller with VID Inputs for Portable GPU Core-Voltage Regulator

ISL62875
Absolute Maximum Ratings
VCC, PVCC, PGOOD to GND . . . . . . . . . . . . . -0.3V to +7.0V
VCC, PVCC to PGND . . . . . . . . . . . . . . . . . . -0.3V to +7.0V
GND to PGND . . . . . . . . . . . . . . . . . . . . . . -0.3V to +0.3V
EN, SET0, SET1, SET2, VO,
VID0, VID1, FB, OCSET, SREF . . . -0.3V to GND, VCC + 0.3V
BOOT Voltage (V_BOOT-GND) . . . . . . . . . . . . . . . -0.3V to 33V
BOOT To PHASE Voltage (V_BOOT-PHASE) . . . -0.3V to 7V (DC)
-0.3V to 9V (<10ns)
PHASE Voltage . . . . . . . . . . . . . . . . . . . . GND - 0.3V to 28V
GND -8V (<20ns Pulse Width, 10µJ)
UGATE Voltage . . . . . . . . . . . . V_PHASE - 0.3V (DC) to V_BOOT
V_PHASE - 5V (<20ns Pulse Width, 10µJ) to V_BOOT
LGATE Voltage . . . . . . . . . . GND - 0.3V (DC) to VCC + 0.3V
GND - 2.5V (<20ns Pulse Width, 5µJ) to VCC + 0.3V
Thermal Information
Thermal Resistance (Typical)
θ_JA (°C/W)
20 Ld µTQFN Package (Notes 4, 5) . . . . . . . .
84
Junction Temperature Range . . . . . . . . . . . -55°C to +150°C
Operating Temperature Range . . . . . . . . . . -10°C to +100°C
Storage Temperature . . . . . . . . . . . . . . . . . -65°C to +150°C
Pb-free Reflow Profile . . . . . . . . . . . . . . . . . .see link below
http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Recommended Operating Conditions
Ambient Temperature Range . . . . . . . . . . -10°C to +100°C
Converter Input Voltage to GND . . . . . . . . . . . . 3.3V to 25V
VCC, PVCC to GND . . . . . . . . . . . . . . . . . . . . . . . . 5V ±5%
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:
4. θ_JA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach”
features. See Tech Brief TB379.
5. For θ_JC, the “case temp” location is the center of the exposed metal pad on the package underside.
Electrical Specifications
These specifications apply for T_A = -10°C to +100°C, unless otherwise stated.
All typical specifications T_A = +25°C, VCC = 5V. Boldface limits apply over the operating
temperature range, -10°C to +100°C.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
MAX
(Note 7) TYP (Note 7) UNIT
VCC and PVCC
VCC Input Bias Current
VCC Shutdown Current
PVCC Shutdown Current
VCC POR THRESHOLD
I_VCC EN = 5V, VCC = 5V, FB = 0.55V, SREF < FB
-
1.1
1.5
mA
I_VCCoff EN = GND, VCC = 5V
-
0.1
1.0
µA
I_PVCCoff EN = GND, PVCC = 5V
-
0.1
1.0
µA
Rising VCC POR Threshold Voltage
Falling VCC POR Threshold Voltage
REGULATION
V_{VCC_THR}
V_{VCC_THF}
4.40 4.49 4.60
V
4.10 4.22 4.35
V
Reference Voltage
System Accuracy
V_REF(int)
VID0 = VID1 = GND, PWM Mode = CCM
-
0.50
-
V
-0.75
- +0.75 %
PWM
Switching Frequency
VO
F_SW PWM Mode = CCM
450 500 550 kHz
VO Input Voltage Range
VO Input Impedance
VO Reference Offset Current
VO Input Leakage Current
ERROR AMPLIFIER
V_VO
R_VO
I_VOSS
I_VOoff
EN = 5V
V_ENTHR < EN, SREF = Soft-Start Mode
EN = GND, VO = 3.6V
0
-
3.6
V
-
600
-
kΩ
-
10
-
µA
-
0.1
-
µA
FB Input Bias Current
SREF
I_FB EN = 5V, FB = 0.50V
-20
-
+50
nA
SREF Operating Voltage Range
Soft-Start Current
V_SREF
I_SS
Nominal SREF Setting with 1% Resistors
SREF = Soft-Start Mode
0.5
-
1.5
V
10
20
30
µA
8
September 18, 2009
FN6905.1