参数资料
型号: MAX1541ETL+T
厂商: Maxim Integrated Products
文件页数: 10/49页
文件大小: 0K
描述: IC REG CTRLR DIVIDER PWM 40-TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
PWM 型: 电流模式
输出数: 2
频率 - 最大: 620kHz
占空比: 100%
电源电压: 2 V ~ 28 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 40-WFQFN 裸露焊盘
包装: 带卷 (TR)
Dual Step-Down Controllers with Saturation
Protection, Dynamic Output, and Linear Regulator
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 15V, V CC = V DD = ON1 = ON2 = 5V, SKIP = GND, LDOIN (MAX1541) = V+, T A = -40°C to +85°C , unless otherwise noted.)
(Note 4)
PARAMETER
SYMBOL
CONDITIONS
MIN
MAX
UNITS
High
V CC -
0.4V
Four-Level Input Logic Levels
TON, OVP/UVP, LSAT, SKIP ,
FBLANK
Open
3.15
3.85
V
REF
Low
1.65
2.35
0.5
Note 1: For the MAX1540A, the gate-driver input supply (V DD ) is internally connected to the fixed 5V linear-regulator output
(LDOOUT),
and the linear-regulator input supply (LDOIN) is internally connected to the battery voltage input (V+).
Note 2: When the inductor is in continuous conduction, the output voltage has a DC regulation level higher than the error-comparator
threshold by 50% of the ripple. In discontinuous conduction ( SKIP = GND, light load), the output voltage has a DC regulation
level higher than the trip level by approximately 1.5% due to slope compensation.
Note 3: On-time and off-time specifications are measured from 50% point to 50% point at the DH_ pin with LX_ = GND, VBST_ = 5V,
and a 250pF capacitor connected from DH_ to LX_. Actual in-circuit times may differ due to MOSFET switching speeds.
Note 4: Specifications to -40°C are guaranteed by design, not production tested.
Typical Operating Characteristics
(MAX1541 circuit of Figure 12, V IN = 12V, V DD = V CC = 5V, SKIP = GND, TON = REF, T A = +25°C, unless otherwise noted.)
100
OUT2 EFFICIENCY vs. LOAD CURRENT
(V OUT2 = 2.5V)
2.55
2.5V OUTPUT VOLTAGE (OUT2)
vs. LOAD CURRENT
100
OUT1 EFFICIENCY vs. LOAD CURRENT
(V OUT1 = 1.0V)
95
90
85
80
75
V IN = 7V
2.54
2.53
2.52
95
90
85
80
75
SKIP = GND
SKIP = V CC
70
V IN = 12V
2.51
70
65
60
55
V IN = 20V
SKIP = GND
SKIP = V CC
2.50
2.49
SKIP = GND
SKIP = V CC
65
60
55
V IN = 7V
V IN = 12V
V IN = 20V
50
2.48
50
0.01
0.1
1
10
0
1
2
3
4
5
0.01
0.1
1
10
LOAD CURRENT (A)
LOAD CURRENT (A)
LOAD CURRENT (A)
10
______________________________________________________________________________________
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