MAX1544 Datasheet, PDF (6/42 Pages) Maxim Integrated Products – Dual-Phase, Quick-PWM Controller for AMD Hammer CPU Core Power Supplies

Dual-Phase, Quick-PWM Controller for
AMD Hammer CPU Core Power Supplies
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V+ = 15V, V_CC = V_DD = V_SHDN = V_TON = V_SKIP = V_S0 = V_S1 = V_OVP = 5V, V_FB = V_CMP = V_CMN = V_CSP = V_CSN =
1.3V, OFS = SUS = GNDS = D0–D4 = GND; T_A = 0°C to +85°C, unless otherwise specified. Typical values are at T_A = +25°C.)
PARAMETER
D0–D4 Logic Input Low Voltage
D0–D4 Input Current
SYMBOL
D0–D4
CONDITIONS
MIN TYP MAX UNITS
0.8
V
-2
+2
µA
High
V_CC -
0.4
Four-Level Input Logic Levels
Four-Level Input Current
TON, S0–S1
Open
3.15
REF
1.65
Low
TON, S0–S1 forced to GND or V_CC
-3
3.85
V
2.35
0.4
+3
µA
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V+ = 15V, V_CC = V_DD = V_SHDN = V_TON = V_SKIP = V_S0 = V_S1 = V_OVP = 5V, V_FB = V_CMP = V_CMN = V_CSP = V_CSN =
1.3V, OFS = SUS = GNDS = D0–D4 = GND; T_A = -40°C to +100°C, unless otherwise specified.) (Note 5)
PARAMETER
SYMBOL
CONDITIONS
MIN
PWM CONTROLLER
Battery voltage, V+
4
Input Voltage Range
V_CC, V_DD
4.5
DC Output Voltage Accuracy
(Note 2)
V+ = 4.5V to 28V, ^{DAC codes ≥ 1V}
-13
includes load
regulation error
DAC codes from
0.60V to 1V
-20
MAX UNITS
28
V
5.5
+13
mV
+20
OFS Input Range
0
2
V
OFS GAIN
GNDS Gain
TIME Frequency Accuracy
A_OFS
A_GNDS
f_TIME
∆V_OUT/∆V_OFS;
∆V_OFS = V_OFS, V_OFS = 0 to 1V
∆V_OUT/∆V_OFS;
∆V_OFS = V_OFS-V_REF, V_OFS = 1V to 2V
∆V_OUT/∆V_GNDS
1000kHz nominal, R_TIME = 15kΩ
500kHz nominal, R_TIME = 30kΩ
250kHz nominal, R_TIME = 60kΩ
TON = GND
(550kHz)
-0.131
-0.131
0.94
880
450
220
150
-0.115
V/V
-0.115
1.01
V/V
1120
550
kHz
280
210
On-Time (Note 3)
TON = REF
315
t_ON
V+ = 12V,
V_FB = V_CCI = 1.2V
(300kHz)
TON = open
470
(200kHz)
395
ns
580
TON = V_CC
910
(100kHz)
1150
Minimum Off-Time (Note 3)
TON = GND
t_{OFF(MIN) TON = VCC, open, or REF}
380
ns
490
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