Asynchronous Boost Controller 
FP5139 
 
 
General Description 
  The FP5139 is a boost topology switching regulator control IC for battery-powered applications. 
The  FP5139  includes  a  totem-pole  single  output  stage  for  driving  NPN  transistor  or  N-MOS,  high 
precision reference voltage(0.5V) to compare output voltage with feedback amplifier, an internal duty 
time control for controlling the minimum duty cycle, programmable soft start with short circuit protection 
function and logic level control for operating mode or standby mode. 
 
Features 
  Wide Supply Voltage Operating Range: 1.8 to 15V 
  Precision Reference Voltage: 0.5V  ±2% 
  Low Current Consumption: 5.5mA in Operation Mode 
  Low Current Consumption: 1μA in Standby Mode 
  High Oscillator Frequency: 1MHz max. 
  Totem-Pole Output with Adjustable ON / OFF Current (for NPN Transistors or n-Channel MOSFET) 
  Logic Level Control Stand-by Mode Function 
  Programmable Soft Start Function (SS) 
  Short Circuit Protection Function (SCP) 
  Package: TSSOP-8L   
 
Applications   
  Digital Camera 
  PDA 
  Portable Equipment 
 
 
This datasheet contains new product information.    Feeling Technology reserves the rights to modify the product specification without notice. 
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. 
 
Website: http://www.feeling-tech.com.tw 
 
1/15 
 
Rev. 1.2
 
Function Block Diagram 
 
 
VCC
OSC
 
 
FP5139 
 
Reference
voltage supply
1.25V
0.6V
0.1V
36k
Error Amp.
500
-
+
0.5V
FB
COMP
Sawtooth wave
oscillator
PWM
Comp.
0.1V
-
+
+
+
DTC 0.6V
Output drive
control circuit
0.22V
OUT
30k
Soft Start SCP
 
GND
SCP
BR /
CTL
 
This datasheet contains new product information.    Feeling Technology reserves the rights to modify the product specification without notice. 
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. 
 
Website: http://www.feeling-tech.com.tw 
 
Rev. 1.2
 
2/15 
 
 
 
FP5139 
 
I / O
Connect a Capacitor to this pin 
IC power supply 
Description 
I  Error Amplifier Inverting Input 
I  Soft Start and SCP Function 
P 
I  Output Current Setting and Control 
O  Totem-Pole Output 
P 
I  Oscillator Output: Connect Capacitor and 
O  Error Amplifier Compensation Output   
IC Ground   
Resistor to this pin for Frequency Adjustment
Name No.
1 
FB 
SCP 
VCC 
BR / CTL
 
OUT 
GND 
OSC 
COMP
2 
3 
4 
5 
6 
7 
8 
Pin Descriptions 
 
TSSOP-8L 
 
 
 
 
 
 
 
 
 
 
Marking Information 
 
TSSOP-8L 
FP5139
9Fa-86L
Halogen Free
Lot Number
Internal ID
Per-Half Month
Year
 
For Example: 132386TB  86 
 
 
 
Halogen Free: Halogen free product indicator 
 
Lot Number: Wafer lot number’s last two digits 
 
 
 
 
Internal ID: Internal Identification Code 
 
Per-Half Month: Production period indicated in half month time unit 
 
 
 
 
 
Year: Production year’s last digit 
 
 
For Example: January  →  A (Front Half Month), B (Last Half Month) 
  February →  C (Front Half Month), D (Last Half Month) 
 
This datasheet contains new product information.    Feeling Technology reserves the rights to modify the product specification without notice. 
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. 
 
Website: http://www.feeling-tech.com.tw 
 
Rev. 1.2
 
3/15 
 
Ordering Information 
Part Number 
Operating Temperature
FP5139BWR-LF 
 
Absolute Maximum Ratings 
-10°C ~ +85°C 
Symbol Conditions 
Parameter 
Power Supply Voltage 
Output Source Current 
Output Sink Current 
Allowable Power Dissipation 
Storage Temperature 
Lead Temperature 
 
 
Suggested IR Re-flow Soldering Curve 
 
 
 
 
FP5139 
 
Package 
TSSOP-8L 
MOQ 
2500EA 
Description 
Tape & Reel 
VIN   
 
 
 
 
 
 
 
 
 
 
 
 
SOP-8L, TA +25≦ ℃ 
MSOP-8L, TA +25≦ ℃ 
TTSOP-8L, TA +25≦ ℃ 
 
SOP-8L, (soldering, 10 
sec) 
TSSOP-8L, (soldering, 10 
sec) 
MSOP-8L, (soldering, 10 
sec) 
Min. 
 
 
 
 
 
 
-55 
 
 
 
Typ.  Max. 
15 
-50 
50 
570 
400 
400 
+125 
 
 
 
 
 
 
 
 
 
 
+260 
+260 
+260 
Unit 
V 
mA 
mA 
mW 
mW 
mW 
℃ 
℃ 
℃ 
℃ 
 
 
 
 
 
 
 
 
 
This datasheet contains new product information.    Feeling Technology reserves the rights to modify the product specification without notice. 
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. 
 
Website: http://www.feeling-tech.com.tw 
 
Rev. 1.2
 
4/15 
 
 
 
FP5139 
 
Recommended Operating Conditions 
Parameter 
Symbol
Conditions 
Supply Voltage 
Operating Temperature   
 
 
DC Electrical Characteristics (VCC= +2V, TA=25℃, unless otherwise noted) 
 
 
 
 
Min. 
1.8 
-10 
Typ.  Max. 
15 
+85 
 
 
Unit 
V 
℃ 
Test Conditions 
Min. 
Typ. 
Max. 
Unit 
Parameter 
Symbol
Under Voltage Lock-Out Section (UVLO) 
VLOW 
Low Threshold Voltage 
Upper Threshold Voltage 
VUPPER 
Soft Start Section (SS) 
ISS 
Input Source Current 
Soft Start Threshold Voltage 
VSST 
Short Circuit Protection Section (SCP) 
Input Source Current 
SCP Threshold Voltage 
Oscillator Section 
Oscillation Frequency 
Frequency Change With Voltage 
Frequency Change With 
Temperature 
Idle Period Adjustment Section 
f 
 
 
VSCP= 0V 
 
ISCP  VSCP= 0V 
VSCP 
 
RT =3.0KΩ, CT =270pF 
Δf / ΔV  VCC =2V to 15V 
Δf / ΔT  TA = 0℃ to 85℃ 
Maximum Duty Cycle 
Maximum Duty Cycle Change   
With Temperature 
Total Device Section 
Standby Current 
Average Current Consumption 
Error Amplifier Section 
Input Threshold Voltage 
VT Change With Voltage 
VT Change With Temperature 
Input Bias Current 
Voltage Gain 
Frequency Bandwidth 
Output Voltage Swing Positive 
Output Voltage Swing Negative 
Output Source Current 
Output Sink Current 
TDUTY  RT =3.0kΩ, CT =270pF, 
Δ TDUTY  
/ ΔT      TA = -10℃ to 85℃ 
VFB =0.8V 
ISTANDBY Pin 4 is open or =VCC 
IAVE  RB =390Ω, VCC =0~15V 
VCOMP =450mV 
VCC =2V to 15V 
VFB 
ΔVFB / 
ΔV 
ΔVFB / 
TA = -10℃ to 85℃ 
 
 
AV =0 dB 
 
 
ΔT 
IB 
Av 
BW 
VPOS 
VNEG 
ISOURCE  VCOMP =450 mV 
ISINK  VCOMP =450 mV 
 
1.1 
-1.5 
0.8 
-1.5 
0.7 
400 
 
 
 
 
 
 
 
1.3 
-1.0 
0.9 
-1.0 
0.8 
500 
2 
5 
85 
10 
 
5.0 
490 
500 
 
 
-1.0 
 
 
0.78 
 
 
24 
5 
1 
-0.2 
100 
6 
0.87 
0.05 
-40 
40 
0.9 
1.5 
-0.7 
1.0 
-0.7 
0.9 
600 
10 
 
 
 
1 
10 
510 
20 
 
1.0 
 
 
 
0.2 
-24 
 
V 
V 
µA 
V 
μA 
V 
KHz 
% 
% 
% 
% 
μA 
mA 
mV 
mV 
% 
μA 
V / V 
MHz 
V 
V 
μA 
μA 
This datasheet contains new product information.    Feeling Technology reserves the rights to modify the product specification without notice. 
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. 
 
Website: http://www.feeling-tech.com.tw 
 
Rev. 1.2
 
5/15 
 
 
 
FP5139 
 
Parameter 
Symbol
Test Conditions 
Min. 
Typ. 
Max. 
Unit 
 
Output Section 
Output High Voltage 
 
Output Saturation Voltage 
VOH1  RB=390Ω, IO=-15mA 
VOH2  RB=750Ω, IO=-10mA, 
VCC= 1.8V 
VOL1  RB=390Ω, IO=15mA 
VOL2  RB=750Ω, IO=10mA, 
VCC= 1.8V 
IOSOURCE RB=390Ω, Vo=0.9V 
IOSINK  RB=390Ω, Vo=0.3V 
RO 
 
Output Source Current 
Output Sink Current 
Internal Pull-Down Resistor 
Output Current Setting / Control Section 
Pin Voltage 
Input Off Condition 
Input On Condition 
Pin Current Range 
VBR  RB=390Ω 
IOFF 
ION 
IBR 
 
 
 
1.0 
0.8 
 
 
 
30 
20 
0.15 
-20 
 
-1.8 
1.2 
1.0 
0.1 
0.1 
-40 
40 
30 
0.22 
 
 
 
 
 
0.2 
0.2 
-20 
- 
40 
0.3 
0 
-45 
-0.1 
V 
V 
V 
V 
mA 
mA 
kΩ 
V 
μA 
μA 
mA 
This datasheet contains new product information.    Feeling Technology reserves the rights to modify the product specification without notice. 
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. 
 
Website: http://www.feeling-tech.com.tw 
 
Rev. 1.2
 
6/15 
 
Typical Operating Characteristics 
(VCC=2V, TA= 25°C, unless otherwise noted) 
 
 
FP5139 
 
Supply Voltage vs. Supply Current
Supply Voltage vs. Input Threshold Voltage
TA=25 ℃
R B =390 Ω
TA=25 ℃
1.2
1.0
0.8
0.6
0.4
0.2
0
4
8
12
16
20
0
0
4
8
12
16
20
Su pply Voltage Vcc(V)
Figure 1
A mbient te mperature vs. Input threshod
voltage variation ratio
Vcc =2V
Su pply Voltage V cc(V)
Figure 2
High Level Output
Vcc=2 V
R B =390 Ω
TA=25 ℃
1.2
1.0
0.8
0.6
0.4
0.2
0
25
50
75
100
A m bie nt T e m peratu re TA ( ℃ )
Figure 3
0
0
-10
-20
-30
-40
-50
High Level Output Current
Iout (m A)
Figure 4
Low level output
B R / C TL pin Current vs. Output Source Current
Vcc=2V
R B=390
TA=25 ℃
V cc=2 V
V OUT =0.9V
TA=25 ℃
-60
-50
-40
-30
-20
-10
12
10
8
6
4
2
0
30
10
5
0
-5
-10
-15
25
600
500
400
300
200
100
0
0
20
40
60
80
100
0
0
-0.4
-0.8
-1.2
-1.6
-2.0
Lo w level output current
Iout ( m A)
B R / CT L pin current IBR (m A)
Figure 5
Figure 6
This datasheet contains new product information.    Feeling Technology reserves the rights to modify the product specification without notice. 
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. 
 
Website: http://www.feeling-tech.com.tw 
 
7/15 
 
Rev. 1.2
 
 
 
FP5139 
 
 
This datasheet contains new product information.    Feeling Technology reserves the rights to modify the product specification without notice. 
No liability is assumed as a result of the use of this product. No rights under any patent accompany the sales of the product. 
 
Website: http://www.feeling-tech.com.tw 
 
8/15 
 
Rev. 1.2