ISL65426_07 Datasheet, PDF (8/22 Pages) Intersil Corporation – 6A Dual Synchronous Buck Regulator with Integrated MOSFETs

ISL65426
Electrical Specifications
PARAMETER
Recommended operating conditions unless otherwise noted. VCC = PVIN = 5.0V,
T_A = -10°C to +100°C for ISL65426HRZ and T_A = -40°C to +85°C for ISL65426IRZA. (Note 2) (Continued)
TEST CONDITIONS
MIN TYP MAX UNITS
Maximum Output Current
Per Block; VCC = PVIN = 5.0V; VOUT = 1.8V (Note 3)
1.0
A
Per Block; VCC = PVIN = 2.375V; VOUT = 1.2V
1.0
A
(Note 3)
Peak Output Current Limit
Per Block
2.0
A
Upper Device r_DS(ON)
Lower Device r_DS(ON)
Efficiency
0.4A Per Block, VCC = PVIN = 3.3V, VOUT = 1.8V
0.4A Per Block, VCC = PVIN = 3.3V, VOUT = 1.8V
0.5A Per Block, VCC = PVIN = 3.3V, VOUT = 1.1V
60
100
140
mΩ
30
55
85
mΩ
90
%
0.5A Per Block, VCC = PVIN = 5V, VOUT = 2.5V
95
%
POWER-ON RESET AND ENABLE PINS
VCC POR Threshold
VCC Rising
2.15 2.25 2.35
V
VCC Falling
2.05 2.15 2.25
V
PVIN POR Threshold
PVIN Rising; Configuration 5:1
1.9 2.05 2.15
V
PVIN Falling; Configuration 5:1
1.75 1.90 2.00
V
PVIN Bias Output Voltage Enable Threshold VOUT2 = 3.3V; VCC = PVIN
4.1
4.3
4.5
V
VOUT2 = 2.5V; VCC = PVIN
2.8
2.9
3.0
V
EN1/EN2 Threshold
Rising Threshold; VCC = 5V
1.0
1.2
1.45
V
Hysteresis
280
mV
Rising Threshold; VCC = 3.3V
0.75 0.98 1.20
V
Hysteresis
200
mV
Rising Threshold; VCC = 2.375V
0.55 0.82 1.05
V
Hysteresis
185
mV
EN1/EN2 Pull Up
7
10
15
μA
EN Threshold
0.57
0.6
0.63
V
EN Sink Current
EN = GND
7
11
15
μA
Soft-Start Time
4
ms
POWER GOOD SIGNAL
Rising Threshold
Rising Hysteresis
Falling Threshold
Falling Hysteresis
Power Good Drive
As % of VREF; V_OUT1 = 1.8V; V_OUT2 = 3.3V
As % of VREF; V_OUT1 = 1.8V; V_OUT2 = 3.3V
As % of VREF; V_OUT1 = 1.8V; V_OUT2 = 3.3V
As % of VREF; V_OUT1 = 1.8V; V_OUT2 = 3.3V
VCC = 5V; PG1 = PG2 = 0.4V
110
115
120
%
5
7
9
%
80
85
90
%
4
7
9
%
1
mA
Power Good Leakage
1
μA
PROTECTION FEATURES
Undervoltage Monitor
Undervoltage Trip Threshold
As % of VREF
70
75
80
%
Undervoltage Recovery Threshold
As % of VREF
82
89
95
%
THERMAL MONITOR
Thermal Shutdown Temperature (Note 3)
150
°C
NOTE:
3. Not production tested.
8
FN6340.2
February 21, 2007