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HM1531 Datasheet(PDF) 3 Page - Shenzhen Huazhimei Semiconductor Co., Ltd

Part No. HM1531
Description  HM1531 High Efficiency DC-DC Boost Regulator
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Manufacturer  HMSEMI [Shenzhen Huazhimei Semiconductor Co., Ltd]
Direct Link  http://www.hmsemi.com/
Logo HMSEMI - Shenzhen Huazhimei Semiconductor Co., Ltd

HM1531 Datasheet(HTML) 3 Page - Shenzhen Huazhimei Semiconductor Co., Ltd

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Ver1.1
Feb 22,2013
3
Electrical Characteristics
(
VDD = 5 V、Ta = 25℃, Unless otherwise specified)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
CONDITION
Power Supply Voltage for
normal operation
VDD
2.8
7
V
For normal operation after start-up
Min Input Startup Voltage
VST1
1.6
V
1mA load, VDD tied to VOUT
Input Startup Voltage with
Heavy Load
VST2
2.6
V
VDD tied to VOUT
Min Input Hold Voltage
VHLD
0.9
V
VDD tied to VOUT
Feedback Voltage
VFB
600
mV
Feedback Voltage
Temperature Coefficient
VFBTC
130
ppm/℃
Feedback Voltage Supply
Regulation
Vreg
0.2
%/V
Close Loop. Varying VDD by
adjusting Resistor Divider Ratio
Load Regulation
Ireg
0.3
%/A
Quiescent Current
Iq
350
uA
No Switching
OFF current
Ioff
1
uA
Oscillator Frequency
fosc
550
KHz
Max Duty
Dmax
90
%
Duty boundary for
PWM/PFM
Dmin
15
%
Current Limit Set Voltage
Vlim
250
mV
DRV PMOS On Resistor
Ronp
10
Ohm
Min measured at 3V VDD
DRV NMOS On Resistor
Ronn
7.5
Ohm
Min measured at 3V VDD
DRV PMOS Max Output
Current
Imaxp
230
mA
Min measured at 3V VDD
DRV NMOS MAX Output
Current
Imaxn
190
mA
Min measured at 3V VDD
FB OVP Threshold
Vovp
720
mV
Measured at FB
FB OVP Hysteresis
Vophys
100
mV
Measured at FB
TSD Threshold
TSD
140
degc
TSD Hysteresis
TSDhys
20
degc
EN High Level
VH
1
V
EN Low Level
VL
0.3
V
Soft Start Time
Tss
10
mS
VIN=1.5V,VOUT=5V,LOAD=1mA
HM1531 High Efficiency
DC-DC Boost Regulator


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